K12/13GT Oil Weight - K-Bikes.com - Excellence in Motion
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post #1 of 4 (permalink) Old Apr 11th, 2019, 5:46 pm Thread Starter
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K12/13GT Oil Weight

Hello all. It has been brought to my attention that we are supposed to use 5w-40 oil in our machines. I have been using 10w40 motul 7100 for 20,000 miles and it seems to run fine. I also ride every day through traffic in an extremely hot climate. Should I make the switch to 5w oil? It just seems like it would be a little too thin for the Texas heat. Any opinions or inputs are welcomed.

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post #2 of 4 (permalink) Old Apr 11th, 2019, 6:18 pm
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I live in Texas too and make runs through West Texas in the summer. I always use 5W-40 in my bike with no problem. Manual says 10W-50 is okay also.
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post #3 of 4 (permalink) Old Apr 11th, 2019, 10:41 pm Thread Starter
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Quote:
Originally Posted by TF1200RT View Post
I live in Texas too and make runs through West Texas in the summer. I always use 5W-40 in my bike with no problem. Manual says 10W-50 is okay also.
Thanks. I think I'll switch over to 5 weight oil after my bun burner run next month. Im on a 07 k12gt and my manual recommends 10w-40. I guess BMW figured lighter oil is better for clutch lubrication? I just replaced my clutch for the first time last weekend anyways, so I assume I'm good for another 5-6000 miles on fresh 10w40.

Last edited by eliastfk; Apr 11th, 2019 at 10:49 pm.
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post #4 of 4 (permalink) Old Today, 3:42 pm
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Always used 10/40 Spectro Gold...but I only have 78k miles so someone with more may chime in.
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