As I understand, Mobil 1 Synthetic comes in several versions. The "Racing 4T" version is advertised specifically as their motorcycle/wet clutch compatible oil, but the "High Mileage" oil is almost half the price,easier to find, and doesn't say "energy conserving" in the little circle, which presumably means it doesn't have the friction reducers like graphite and molybdenum disulfide, which would (again,presumably) mean it was acceptable for our purposes.
I've Googled this issue up and down, and read both both thumbs up & down as far as it's use in bikes with wet clutches.
Also, on Mobil's FAQ page, when asked the same question,point blank, they seemed to sidestep the question by tactically saying,"you're looking for our motorcycle oil", but they never stated that the High Mileage was bad for bikes. This lack of clarity on the issue leads me to believe that the high Mileage oil is OK in bikes, but it obviously wouldn't be in their interest to acknowledge that, since they're trying to market a more expensive, bike-specific oil.
The High Mileage oil does have some kind of additives that are supposedly good for vehicles with over 75,000 miles on them IIRC, but as hard as I've tried,I can't find out if these additives are the ones that affect wet clutches.
I've read about Mobil 1 Truck & SUV Oil being good to go for bikes, but I can't find it anywhere, I just see the "Energy Conserving" oils,the High Mileage, or the expensive bike-specific stuff.
As always, any accurate info is much appreciated.........
Edited by Brocephus, April 22, 2011 - 08:06 PM.