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I would like to use Valvoline 75w/90 full synthetic gear oil (MIL-L-2105 E) but Haynes manual specifies MIL-L-2105 B OR C. Could I still use that product? The vechicle is a BMW motorcycle K75S 1989. Thank you in advanvce.

Cat, I have a ´79 R65 BMW and I decided to go for a good synthetic blend 20w-50. I believe in frequent oil changes so it doesn´t make a lot of sense using pure synth if it´s going to the bin every 2K. If you worry about the sludge you should use flushing oil a couple of times in order to clean...

My motorcycle is a BMW R65 ´79 . I bought her a couple years ago with 60000 miles and since then I added another 20000. The first year I used mineral oil 20W-50 SG and changed it every 1500 miles (most of them city riding in stop and go conditions). The last year I decided to go with synthetic...

Hallo everybody! I am new to this forum, I own a BMW R65 ´79 and I have many questions to ask you in the close future... Meanwhile I discovered in the following site http://store.motolit.com/bwm600k.html another BMW owner that has done 600000 miles with his faithful R60/5...Now that is...