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View Poll Results: What engine oil are you using in the k1200s
Mineral oil 119 18.71%
Semi-synthetic oil 92 14.47%
Synthetic oil 425 66.82%
Voters: 636. You may not vote until 'registered'. Please go here: http://www.i-bmw.com/register.php

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  #1  
Old 02-27-2007, 05:54 PM
kralties kralties is offline
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What engine oil are you using

What engine oil are you using in the k1200s,I have done 18000kms and am still using 10w/40 mineral oil and I change it at every 5000kms,what oils are actually recommended by bmw,as i am interested in changing to semi-synthetic or synthetic oil.
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  #2  
Old 02-27-2007, 06:04 PM
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Re: What engine oil are you using

i wish the k12rs had an exposed or remote filter

one that a mess would not be necessary to change oil

or simply to replenish filter

extended oil changes would a breeze
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  #3  
Old 02-27-2007, 06:11 PM
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Re: What engine oil are you using

I use Mobil 1 ...15-50 in my K12rs
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Old 02-27-2007, 06:37 PM
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Re: What engine oil are you using

The owners man. says Castrol GPS semi.I found it in liter containers from our Castrol industrial guy.I switched to BMW syn at 6000 miles after I read a statement from BMW saying that maybe the syn. oil has helped some of the loud shifts.It didn't...Tom
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  #5  
Old 02-27-2007, 08:24 PM
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Re: What engine oil are you using

Quote:
Originally Posted by kralties
What engine oil are you using in the k1200s,I have done 18000kms and am still using 10w/40 mineral oil and I change it at every 5000kms,what oils are actually recommended by bmw,as i am interested in changing to semi-synthetic or synthetic oil.
10w/40 and 15w/40 are recommended in the 2007 Owners Manual, but BMW has approved their 10w/50 synthetic for use as well. Dealer put 10/w50 BMW Synthetic in at the 600 miles service and the S hasn't used a drop in the last 1,000 miles. (Only has 1600 on it so far, but that's subject to change very soon.)

BTW, BMW recommends Castrol is on the back page of the owners manual.

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  #6  
Old 02-28-2007, 03:00 AM
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Re: What engine oil are you using

The joke is that almost all so-called "synthetics" are derived form Group 3 or better mineral oil. Ever since Mobil lost their suit against Castrol, claiming (correctly) that Castrol's synth was Dino based, and the court decision was that the word "Synthetic" referred to the oil's quality and performance, not its source, even Mobil has changed their formulation of Mobil-1 to mostly hydrocracked Group 3 or better Dino stock.

So enough of this silly "Dino-versus-Synthetic" silliness! It is irrelivant. What matters is oil quality and the hell with the supposed source! It just doesn't matter!

As for me, I use Rotella-T 15W40. Good stuff, that! With nearly 200,000 km on the motor, it does not burn a drop between 6 month oil changes.
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  #7  
Old 02-28-2007, 05:35 AM
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Re: What engine oil are you using

The user manual states that full synthetic oil is *not* allowed. We've had a lot of discussions about oil in this forum. I suggest you do a search.

Manfred
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  #8  
Old 02-28-2007, 06:39 AM
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Re: What engine oil are you using

Castrol GPS 10w/40 2t
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  #9  
Old 02-28-2007, 08:28 AM
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Re: What engine oil are you using

Mobile 1 MX4t synth motorcycle oil
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  #10  
Old 02-28-2007, 09:43 AM
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Re: What engine oil are you using

I use BMW 15w/50 synthetic and have since first oil change 14k+ miles ago. Have not seen any ill effects and have not used any oil between changes. BMW did put out a bullitin that their synthetic was now ok to use. I think the bullitin came out last year sometime.
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  #11  
Old 02-28-2007, 01:06 PM
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Re: What engine oil are you using

Quote:
Originally Posted by ManfredH
The user manual states that full synthetic oil is *not* allowed. We've had a lot of discussions about oil in this forum. I suggest you do a search.
My point was that it is almost impossible now to buy "full synthetic" oil. Nearly all oils labelled as "synthetic" are mainly formulated from Group 3 or better (highly modified) Dino stock (see my earlier post).

So my point remains.... go ahead an use "synthetic" oil because it isn't what most people think it is.
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  #12  
Old 02-28-2007, 03:51 PM
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Re: What engine oil are you using

I use BMW 15-50 Synthetic oil. Once I switched to synthetic it stopped the clunk from 1st to 2nd and 2nd to 3rd. It really did smooth out the shifting. Since it's such a high priced oil, I won't change it out for 6k or unless it starts it's clunking again when shifting. However, it was smooth for the last 6k usage, so I'll stick to that schedule...
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  #13  
Old 02-28-2007, 05:25 PM
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Re: What engine oil are you using

there is a definitive difference
between.....
parafin base
dino
& ester base lubricants

their structure... formulation.....properties
lend themselves to better performance
in certain areas

tailoring the best oil
to an engine....tranny or rearend
type of riding.......longevity
& reliabilty is not altogether tea leaf
reading & sooth sayin

many of the old rules of thumb
started 3-4 decades ago
with air cool engines & clearances & tolerances
that easily average 10x what is acceptable today

no less HP & torque were down then 2-3x

yet many still cling to those same old rules

they arent wrong for doing so

its just that its another century
if you are going to retrogress
trade in all of the GPS.....LCD's & LeD's
& other bells & whistles
that most didnt have......did not even WANT
from those days gone by

things are bettter now ??????
engines are better now ?????

oil is a hell of a lot better Now !!!!


good luck
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  #14  
Old 02-28-2007, 11:14 PM
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Re: What engine oil are you using

Quote:
Originally Posted by Shelley
I use BMW 15-50 Synthetic oil. Once I switched to synthetic it stopped the clunk from 1st to 2nd and 2nd to 3rd. It really did smooth out the shifting. Since it's such a high priced oil, I won't change it out for 6k or unless it starts it's clunking again when shifting. However, it was smooth for the last 6k usage, so I'll stick to that schedule...

OK...I'll show my ignorance here. I'm obviously in the dark ages here as my last K12 was a "old" 1999 and now I ride an '05 GS. So do the engine and transmission share the same oil in the new K12's ala the Japanese fours? Seems to be a step in the wrong direction IMHO.

Jim
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  #15  
Old 03-01-2007, 09:55 AM
kralties kralties is offline
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Re: What engine oil are you using

I am waiting until tomorrow for the final results of the poll but it looks like I will be changing over to silkolene 10-40w synthetic oil as that is how the majority seem to favour
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  #16  
Old 03-01-2007, 10:00 AM
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Re: What engine oil are you using

Quote:
Originally Posted by JimB
OK...I'll show my ignorance here. I'm obviously in the dark ages here as my last K12 was a "old" 1999 and now I ride an '05 GS. So do the engine and transmission share the same oil in the new K12's ala the Japanese fours? Seems to be a step in the wrong direction IMHO.

Jim
Yes, the transmission of the new K's is bathed in engine oil just like the Japanese bikes. I don't view it as a step in the wrong direction. One oil change does two jobs. The Japanese have been doing it for years with no ill effects.
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  #17  
Old 03-01-2007, 10:43 AM
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Re: What engine oil are you using

Castrol GPS 10W/40
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  #18  
Old 03-01-2007, 10:51 AM
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Re: What engine oil are you using

true most motorcycles have long used
common oil sumps for lubrication

no less some decadesd ago did not used
separate filter elements
(thr orig chevy v8 had no oil filter)

all to no ill effect
was back when oil/gas was cheap
change the oil often
avoid problems

back in the late 50's
ford had dual filter elements on their v8's
had fewer problems associates with wear & reliabilty

simply stated
there are few bad oils manufactured & marketed
these days

unless extreme/severe activity is anticipated
few will ever tax their oil to the point of
catastrophic failure

yet all brands....alll dealerships
have open & waiting repair bays
which is realistic point of view
things break
things wear out
s***t happens.....

do i think that most synthethics marketed today are better than & WORTH
their expense than regular dino oils
unequivocally YES !!!!!

do i think its necessary to pay 9.....12....15 $$$$$
a quart for peace of mind...........
unequivocally NO!!!!!!!!

many hi $$$$$ marques come with synthethics already in the sump
many os the same race on the very oils
from shell & mobil
we can buy at walmart.....advance ... & auto zone

given a proper break in
driven robustly
routine maintenance appplied
any engine should run satisfactorily

any top of the line..........not to mean most expensive $$$$
synthethic.....or blended syn
should fill that bill

i think the gap is greater between
reg dino with their best addictive packages
& the better synthethics

than the gap is between full syns
blended syns
or name brand syns
with elitist marketing


good luck
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  #19  
Old 03-01-2007, 11:21 AM
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Re: What engine oil are you using

Mobile 1 MXT4, since the 1st service at 1600 miles. Just about to turn 14K, hasn't burned a drop and shifts smoothly .
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Old 03-01-2007, 08:05 PM
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Re: What engine oil are you using




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  #21  
Old 03-02-2007, 11:03 PM
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Re: What engine oil are you using

Quote:
Originally Posted by peteo
BMW did put out a bullitin that their synthetic was now ok to use. I think the bullitin came out last year sometime.
I wasn't aware of that, after how many miles?
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Old 03-16-2007, 11:05 AM
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Re: What engine oil are you using

Strange
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  #23  
Old 03-16-2007, 11:40 AM
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Re: What engine oil are you using

Quote:
Originally Posted by BulletTrain
I wasn't aware of that, after how many miles?
I have been using synthetic since first oil change. If your bike doesn't use oil between changes then it is safe to go to synthetic. Number of miles has nothing to do with it.
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Old 03-16-2007, 12:07 PM
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Re: What engine oil are you using

Quote:
Originally Posted by peteo
I have been using synthetic since first oil change. If your bike doesn't use oil between changes then it is safe to go to synthetic. Number of miles has nothing to do with it.
Good to know, thanks for the info.
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  #25  
Old 03-27-2007, 12:57 AM
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Re: What engine oil are you using

I use Castrol GTX 20-50w (mineral). At 10k presently, my next will be to Castrol GPS, or Syntec. Of all my bikes, rice burners mostly, riding at extreme higher speeds and revs Castrol is the way to go.
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Old 03-27-2007, 10:51 PM
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Re: What engine oil are you using

Quote:
Originally Posted by RedHawK12GT
I use Castrol GTX 20-50w (mineral). At 10k presently, my next will be to Castrol GPS, or Syntec. Of all my bikes, rice burners mostly, riding at extreme higher speeds and revs Castrol is the way to go.








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Old 03-27-2007, 11:23 PM
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Re: What engine oil are you using

Quote:
Originally Posted by racegun






OK, HotShot.....whatta you use?. Let me guess....WalMart brand.
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  #28  
Old 03-28-2007, 07:38 AM
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Re: What engine oil are you using

Quote:
Originally Posted by RedHawK12GT
Let me guess....WalMart brand.
That's what I use!
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Old 03-28-2007, 09:02 AM
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Re: What engine oil are you using

Castrol GPS 15w-50
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Old 03-28-2007, 10:28 PM
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Re: What engine oil are you using

Quote:
Originally Posted by BulletTrain
I wasn't aware of that, after how many miles?

I read the service bulletin today, and BMW says after 6K it's okay. 10w-40 or 15w-50 (of course that would be BMW synth oil, )which is not truly synth oil, but then again, it is, by current legal definitions)).
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Old 03-28-2007, 10:31 PM
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Re: What engine oil are you using

Quote:
Originally Posted by RedHawK12GT
OK, HotShot.....whatta you use?. Let me guess....WalMart brand.

Well Mr. Anal ( you said it not me...lol.....j/k),
I am afraid to say. Cause then an OIL THREAD will start...and it could bring down the server.

So...i will wisper it.... royal purple

Do you think Jamie James of racing fame knows his stuff... cause he has been using it for many many yrs.

I met a man just the other day... he races with it in his busa drag bike... dino says it gave him 5 to 7 hp. Tear downs revealed much less wear than ANY other lube

PHEW....now I said it... remember i am only the messenger
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Old 03-29-2007, 12:39 AM
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Re: What engine oil are you using

Quote:
Originally Posted by Zen Rider
I read the service bulletin today, and BMW says after 6K it's okay. 10w-40 or 15w-50 (of course that would be BMW synth oil, )which is not truly synth oil, but then again, it is, by current legal definitions)).
I appreciate the info, thanks.

Barry
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Old 04-27-2007, 04:24 PM
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Re: What engine oil are you using

Quote:
Originally Posted by Billg
Mobile 1 MXT4, since the 1st service at 1600 miles. Just about to turn 14K, hasn't burned a drop and shifts smoothly .
I've had a couple of PE's tell me that the Mobil is the best syn out there. YMMV
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Old 04-28-2007, 01:23 PM
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Re: What engine oil are you using

Motorex Power Synt 10W50, oil from Switzerland.
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Old 04-29-2007, 12:49 AM
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Re: What engine oil are you using

Quote:
Originally Posted by ManfredH
The user manual states that full synthetic oil is *not* allowed. We've had a lot of discussions about oil in this forum. I suggest you do a search.

Manfred


Castrol GPS is a synthetic oil.... what gives?

http://www.castrol.com/castrol/produ...tentId=6005376
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  #36  
Old 04-29-2007, 01:38 AM
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Re: What engine oil are you using

Synthetics are not always synthetics.

Castrol has been using highly processed petroleum based oils and calling them synthetics for a while now (didn't we have this discussion before).

In fact, if you look at the MSDS sheet, you'll see it's labeled a petroleum and synthetic hydrocarbon. Essentially, a blend.

While that one called Castrol R4 Superbike is labeled in the MSDS only as a synthetic hydrocarbon.

Nevertheless, it was most likely tested or maybe even specified by BMW for the proper additives and friction modifiers for your bike.

Edit- Unfortunately, Mobil which used to only use pure synthetics in their "full synthetic" oils are now playing the same name game for cost reasons. Exxon's purchase of them really screwed things up for the rest of us.

Edit2- I knew it was here somewhere, RFW posted it up months ago in this very thread!
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  #37  
Old 04-29-2007, 09:22 AM
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Re: What engine oil are you using

I used the BMW 15/50 petroleum oil up to 15k miles and changed it out every 3k miles. At 15k I switched to Amsoil 20/50 MCV. After almost 2k miles I can say the bike shifts a lot smoother, even when hot. The engine seems to run smoother although with the K1200 engine smooth is par for the course. Some may say the oil is a bit thick but even last winter it didn't seem to have a problem and started right up.
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Old 04-29-2007, 09:57 AM
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Re: What engine oil are you using

I use Royal Purple. The price is good.Bmw oil is far to expencive and as far as I know they don't even make oil so your just buying someone eles oil they sorced out and slaped there name on the jug. You should go by the A.P.I. rating on the jug.SL.SM. are the highest. I looked it up an the A.P.I. site. The higher the last letter the better the oil.
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Old 04-29-2007, 11:43 AM
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Re: What engine oil are you using

I am going to give this the best shot I can. It is very technical, and as I got the info last week, I did not have a recorder & i did not take notes cause I did not expect the engineer to get into it, in such such detail. We talked for about 45 mins. It was very very interesting.

Again this is very complicated with lots of twists....I am only summing up what HE said...

first concept: Basically the Jaso ma & SG ratings are dated back to the early 1990's. They are actaully a little bit more robust. Anti friction additives like zinc etc are in more abundance...by about 5% to 10%. He said it realy is splitting hairs. These ratings have more to do with API, politics, and auto mfgrs. The Auto mfgrs drive oil ratings for the most part. And this is driven by politics and "green-thinking".

second: Certain oils have what are called solids in them. Mobil 1, Amsoil, & Royal Purple have almost no solids. The solids are what a wet clutch does not like.

third: Sence jaso ma & SG ratings are legacy, they are not made mass produced like current oils are. This is the major reason why these M/C oil cost what they do. The higher cost does not necessarily reflect better quality.

fourth: Royal Purple oils like the cycle oil and the 41 ( a 10w-40) are designed for wet clutch bikes, and very expensive engines. These are not made to cater to the API's current watered down ratings ( which reflect green thinking).

The thing I like about RP lubes, is you know exactly whats what. The MAx cycle and 41 exceed jaso ma & SG from a performance, ability to fight heat, repel water, reduce friction, ( after all ones dinomommeter reading are higher w/ RP), not break down, resist acids etc etc etc standpoint
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Old 04-29-2007, 12:58 PM
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Re: What engine oil are you using

Who did you talk to? Just curious.

All that you've stated sounds to gel with what I've read.

1) The more current oil ratings (newer than SG) actually decrease the amount of friction modifiers zinc and phosphorus because they damage catalytic converters. The move was from an environmental standpoint. The compensated by adding other friction modifiers such as...

2) Moly. The solids they are talking about are moly. Newer motorcycle oils actually are using a bit of moly which is an EXCELLENT friction modifier. Unfortunately, car oils use much more of it and at that levels it MAY not be compatible with wet clutches (but probably does wonders for the gearbox).

Your other points I have no comment on.

Honestly, though, I have been thinking about using royal purple in the final drive at least. As far as the engine, it runs fine on what I'm using.
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Old 04-29-2007, 04:58 PM
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Re: What engine oil are you using

Quote:
Originally Posted by jcw
Synthetics are not always synthetics.
Edit- Unfortunately, Mobil which used to only use pure synthetics in their "full synthetic" oils are now playing the same name game for cost reasons. Exxon's purchase of them really screwed things up for the rest of us.
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Old 04-29-2007, 08:16 PM
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Re: What engine oil are you using

Quote:
Originally Posted by jcw
Synthetics are not always synthetics.

Castrol has been using highly processed petroleum based oils and calling them synthetics for a while now (didn't we have this discussion before).

In fact, if you look at the MSDS sheet, you'll see it's labeled a petroleum and synthetic hydrocarbon. Essentially, a blend.

While that one called Castrol R4 Superbike is labeled in the MSDS only as a synthetic hydrocarbon.

Nevertheless, it was most likely tested or maybe even specified by BMW for the proper additives and friction modifiers for your bike.

Edit- Unfortunately, Mobil which used to only use pure synthetics in their "full synthetic" oils are now playing the same name game for cost reasons. Exxon's purchase of them really screwed things up for the rest of us.

Edit2- I knew it was here somewhere, RFW posted it up months ago in this very thread!

I talked to engineer at RP. i used to be in the oil business in a way. I worked for mobil oil. Long ago i realized all the short commings of dino feet oil. When I worked for mobil oil, i won a trip to las vegas. I got to meet the mechanic of the then winning indy car team....circa 1982.... we got to talking about engines and lubes etc. He said that all teams use synthetic ...and that the oil in the cans is most of the time M1 ( regardless of what it says on the outside). I have sence be enamored in exotic stuff like oils, recumbent bikes, classical music, ceramic engine parts, forest gump style table tennis...etc etc. I have most eclectic tastes!

I have had lots of real world experience with motor oils as I owned a mechanic shop. Met and talked to many chemical engineers. I could talk on their level, and thus asked many questions over many years. Mobil 1 was one of the top oils..no doubt. THere was a time that you could not pry it out of my cold dead fingers ( well i guess you could <g>) We did many "OIL SHOW DOWNS" over the years. NO ONE OIL DID IT ALL WELL! Some were good at reducing high pressure contact, but were hard on the metals ... BARDALL to name it ( of the engine). None did well when they had water added to them. This is because they all use surfactants to help clean the ICE.

RP does not mix w/ and is not adversely affected by water. That is one of the main reasons I even considered it. After seeing how the gear lube lowerd temps in FD of past bikes and no fuzz would gather on magnet ( not the case w/ other oils) i was sold. LIke I said in past...it took about a yr of seeing results like this for me to become a devotee. I find it amazing when the doubters say what they do, but then i remember how I am the worlds biggest sceptic. Sence BMW says to use Castrol GPS oil ( a synthetic) after break in....

I am going to put the RP MAx oil in my bike this week. I have 1,600 miles on it and lots of revs into the upper limits. I put RP in FD at 800 miles. I will remove it at 3,000 miles and check magnet and oil etc. I will let you all know. BTW the RP will add about 4 hp due to less friction. But to be honest I am looking for the reduced strain on the engine while at Idle in the heat. This last weekend rode bike 200 miles to jass fest in New Orleans. I could tell oil was in a bind ( due to stop and go new orleans traffic) and so was tranny as things heated up....it was a very bad feeling... shifting was more difficult and engine made more mechanical noise. After I let it cool for 3 hrs, sound was less and xmission shifted a bit easyer. I bet that oil is shot if i were to test it!
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Old 04-29-2007, 08:21 PM
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Re: What engine oil are you using

Quote:
Originally Posted by biff
I use Royal Purple. The price is good.Bmw oil is far to expencive and as far as I know they don't even make oil so your just buying someone eles oil they sorced out and slaped there name on the jug. You should go by the A.P.I. rating on the jug.SL.SM. are the highest. I looked it up an the A.P.I. site. The higher the last letter the better the oil.

Biff,
What oil are you using and where? FD & engine?
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Old 04-30-2007, 12:50 AM
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Re: What engine oil are you using

According to the Castrol website GPS is not full synthetic oil, the R4 is their full synthetic motorcycle oil.

GPS is “Synthetic BASED motorcycle oil” “Chemical family: Petroleum/Synthetic hydrocarbon”


“Castrol R4 FULL synthetic moto oil…..” “Chemical family: synthetic hydrocarbon”
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  #45  
Old 05-01-2007, 09:05 PM
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Re: What engine oil are you using

Quote:
Originally Posted by racegun
Biff,
What oil are you using and where? FD & engine?
engine and soon to be in the final drive after reading about the not so everlasting oil in my 05 k12s.
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Old 05-02-2007, 12:09 AM
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Re: What engine oil are you using

Historically...Castrol has made BMW's oils.

Last edited by Fido : 05-02-2007 at 12:10 AM. Reason: spelling
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Old 05-02-2007, 06:28 PM
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Re: What engine oil are you using

Quote:
Originally Posted by biff
engine and soon to be in the final drive after reading about the not so everlasting oil in my 05 k12s.

Which RP engine oil are you using?
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Old 05-03-2007, 06:55 PM
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Re: What engine oil are you using

Quote:
Originally Posted by ManfredH
The user manual states that full synthetic oil is *not* allowed. We've had a lot of discussions about oil in this forum. I suggest you do a search.

Manfred

So many people quote the user manual, but the manual is OUTDATED and WRONG.

The SIB dated July 2005 (#00 001 05) does recommend mineral OR synthetic oil. But the real important part is this, and it is even in BOLD in the SIB

Important Note: This bulletin supercedes all information and recommendations provided in the various editions of the K 1200S and K 1200 R Rider's Manuals, the KSD/TSD Service Data CDs and the K 1200S and K1200 R RepROM CDs.
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Old 05-03-2007, 07:58 PM
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Re: What engine oil are you using

Quote:
Originally Posted by Coastie
So many people quote the user manual, but the manual is OUTDATED and WRONG.

The SIB dated July 2005 (#00 001 05) does recommend mineral OR synthetic oil. But the real important part is this, and it is even in BOLD in the SIB

Important Note: This bulletin supercedes all information and recommendations provided in the various editions of the K 1200S and K 1200 R Rider's Manuals, the KSD/TSD Service Data CDs and the K 1200S and K1200 R RepROM CDs.


that is just plain wacked!!!!!!!!!!!
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Old 05-11-2007, 07:33 PM
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Re: What engine oil are you using

Quote:
Originally Posted by MacMan
Yeah, and that sux! That's just wrong.
No it is not. Modern highly-processed Group 3 "dino" oil has been shown to perform as good as "true" synthetic oil in many areas and actually slightly better than some "true" synthetics in a few others. This was why Mobil lost the court case they brought against Castrol (and their Group 3-based Syntec that they labelled as being "synthetic"). The judge found that the word "synthetic" had come to imply a certain performance level, not the oil's source.

After all is said and done, what matters is that your oil PERFORMS! Your motor doesn't give a damn how it is made. Group 3 Dino oils (that have only been available since the mid '90s) bear very little resemblance to the previous dino oils. Their performance can be on a par with true synthetics, and as I said, performance is all that matters. Even the venerable Mobil1 is mainly made from Group 3 stock now.
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  #51  
Old 05-11-2007, 08:39 PM
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Re: What engine oil are you using

Quote:
Originally Posted by RFW
No it is not. Modern highly-processed Group 3 "dino" oil has been shown to perform as good as "true" synthetic oil in many areas and actually slightly better than some "true" synthetics in a few others. This was why Mobil lost the court case they brought against Castrol (and their Group 3-based Syntec that they labelled as being "synthetic"). The judge found that the word "synthetic" had come to imply a certain performance level, not the oil's source.

After all is said and done, what matters is that your oil PERFORMS! Your motor doesn't give a damn how it is made. Group 3 Dino oils (that have only been available since the mid '90s) bear very little resemblance to the previous dino oils. Their performance can be on a par with true synthetics, and as I said, performance is all that matters. Even the venerable Mobil1 is mainly made from Group 3 stock now.

I understand your point esp. regarding performance. As other's have stated, we will not run these engines long enough to truly benefit.

I understand that a "true" syn has or had a higher TBN and withstood contamination and thermal breakdown longer. I've had some excellent analysis on samples I've pulled using the Mobil 1 in severe duty applications. I'm no PE so I'm sure that some of this is subjective, but some i.e. sample analysis is objective. I have not used and sampled other syn's either pure or dyno Group 3. FWIW/YMMV
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Old 05-11-2007, 09:35 PM
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Re: What engine oil are you using

Synthetic every 6k and dino every 3k.
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Old 05-11-2007, 09:36 PM
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Re: What engine oil are you using

Well not to drift from you folks discussion from oil 101 but I recently purchased a gallon case of 20/50 Amsoil MCV Synthetic and I am thinking it is too thick. So now after one fill I want to go to their 10/40 Amsoil MCF Synthetic and my question is this...

Can I mix the first with the second so I don't have to waste it and have an acceptable mix? Thoughts?
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Old 05-11-2007, 09:44 PM
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Exclamation Re: What engine oil are you using

Check out the Amsoil comparitive oil tests.

http://www.amsoil.com/lit/g2156.pdf


Very infomative

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Old 05-12-2007, 12:03 AM
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Re: What engine oil are you using

Just FYI,

Filled up with 4 quarts of Mobil 1 MX4T fully synthetic motorcycle oil. Clutch slipped in 3rd gear full throttle. Not bad but it was there. I've only got 5000 miles on the bike so I think the clutch is still pretty fresh.

Just a guess but I think there's too much moly.
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Old 05-12-2007, 11:37 AM
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Re: What engine oil are you using

Quote:
Originally Posted by jcw
Just FYI,

Filled up with 4 quarts of Mobil 1 MX4T fully synthetic motorcycle oil. Clutch slipped in 3rd gear full throttle. Not bad but it was there. I've only got 5000 miles on the bike so I think the clutch is still pretty fresh.

Just a guess but I think there's too much moly.

That's strange, I've used that MX4T for a while in wet clutch applications with no problems. It's supposed to be formulated for wet clutch.
Waz up wit dat?
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Old 05-12-2007, 01:26 PM
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Re: What engine oil are you using

I'll definitely try it again this weekend before changing the oil.

(BTW, love the quote in the signature)
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Old 05-12-2007, 03:53 PM
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Re: What engine oil are you using

Quote:
Originally Posted by jcw
(BTW, love the quote in the signature)
Thanks.
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Old 05-12-2007, 05:43 PM
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Re: What engine oil are you using

what does 'clutch slip' feel like ??
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Old 05-12-2007, 07:10 PM
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Re: What engine oil are you using

Engine revs by sound will climb a bit too fast. Then stabilize as the bike speed catches up. Imagine partially pulling the clutch so the revs go up about 1000rpm then letting it back out.
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