5w-40 Shell Rotella T Synthetic in K12GT? - K-Bikes.com - Excellence in Motion
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post #1 of 24 (permalink) Old Aug 8th, 2009, 7:58 pm Thread Starter
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5w-40 Shell Rotella T Synthetic in K12GT?

I am not trying to start a "what's the best oil" thread, but I am right in the middle of the 12K service on my '08K12GT and want to use one of the 3 jugs of Rotella T Synthetic I have sitting on the shelf. I have not found a reason to disqualify the Rotella as a compatable oil for my bike.

Can anyone give me a good reason (facts please) to stop and not use the Rotella?
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post #2 of 24 (permalink) Old Aug 8th, 2009, 8:06 pm
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At the risk of being scolded by the everpresent resident oil mavens, Go ahead and use it-good stuff. Just don't tell your BMW only dealer and friends. They will slap u silly.

Marin Phil
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post #3 of 24 (permalink) Old Aug 8th, 2009, 8:21 pm
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The 5W-40 Rotella is a great choice for your bike. No friction modifiers, good levels of ZDDP, and low ash. On the Rotella forum a Shell engineer recently noted that the latest formulation even meets JASO MA, although they don't plan on formally certifying the oil as such.
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post #4 of 24 (permalink) Old Aug 8th, 2009, 8:57 pm
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I use it in all my bikes and cars, never had a problem.

2007 K1200GT Jet Black


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post #5 of 24 (permalink) Old Aug 8th, 2009, 9:17 pm
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I use it on my crazy K12R for the last oil change.

Problem with the newer oil specs is that they are formulated with more moly and less phosporus. Mainly for emission reasons.Cats don't like phosphorus. But it's a great anti wear agent. Most racing oils will contain high levels of this. An example of how the newest is NOT the best.

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post #6 of 24 (permalink) Old Aug 8th, 2009, 9:33 pm Thread Starter
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Quote:
Originally Posted by JCW
I use it on my crazy K12R for the last oil change.

Problem with the newer oil specs is that they are formulated with more moly and less phosporus. Mainly for emission reasons.Cats don't like phosphorus. But it's a great anti wear agent. Most racing oils will contain high levels of this. An example of how the newest is NOT the best.
I have 3 jugs of the older stuff (3 years old) left over from my old gen K12GT, so it may be the higher phosphorus formulation.
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post #7 of 24 (permalink) Old Aug 8th, 2009, 10:22 pm
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I'm just about ready for 6K oil change, and I shot an E-mail to MAX BMW they say the latest BME recommendation is a new 5W-40 Full synthetic BMW branded, probably made by Castrol. He said it is suppose to address some clutch issues. Anyone know where to get this magical brew? Max doesn't even have it on thier web site.

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post #8 of 24 (permalink) Old Aug 9th, 2009, 9:02 am Thread Starter
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The Rotella went in this morning. I completed the 12K and just got back from my test ride around the neighborhood. For the first time since I've owned the bike it did not judder--1st gear, cold bike launch. I thought it was my imagination, so I stopped several times looking for the judder--nada, nothing.

I am not sure what to think. Can I attribute the improvement to the oil brand, oil weight or the fact that I only had one cup of coffee in me at the time?

Anyway--I am please to be rid of the over priced BMW stuff.

Long live Rotella!

Last edited by Bandera; Aug 9th, 2009 at 9:18 am.
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post #9 of 24 (permalink) Old Aug 9th, 2009, 10:21 am
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It's a fine line balancing an oil for a wet clutch that depends on friction (and may benefit from a heavier oil) and bearings that get destroyed by friction and work best with the "slipperiest" oil.

'06 K1200R- in pieces
'73 Honda CB500F- slow but fun.
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post #10 of 24 (permalink) Old Aug 9th, 2009, 11:40 am
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Quote:
Originally Posted by JCW
It's a fine line balancing an oil for a wet clutch that depends on friction (and may benefit from a heavier oil) and bearings that get destroyed by friction and work best with the "slipperiest" oil.
Yeah, if only someone designed a bike that had the clutch separated from the main engine oil . . .

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