Oil Change

[carsixten]

Originally Posted by smokey

Did I also mention that I use car oil, always have and always will, usually the Castrol GTX 10w40. Never had a problem with any of the 40+ bikes I have had.

Smokey. I think I agree that using Castrol 10w40 wouldn't harm the motor, but what about the clutch? Everything credible I've read says that any oil marked "energy conserving" with the API grade SM or higher, have friction inhibitors that will make your clutch slip.
Is that true, or just more BS from the marketing department?

[smokey]

Originally Posted by carsixten

Smokey. I think I agree that using Castrol 10w40 wouldn't harm the motor, but what about the clutch? Everything credible I've read says that any oil marked "energy conserving" with the API grade SM or higher, have friction inhibitors that will make your clutch slip.
Is that true, or just more BS from the marketing department?

You will find that most if not all oils of 10w40 and above are not energy conserving, I use 10w40 which is not energy conserving, the mobil 1 synthetic at 20w50 or the rotella 15w40 all do not have that label. I should have stated that but I though you would have took it for granted that it is the non energy conserving oil.

[gman47]

Many oils, many opinions. Use an oil for motorcycle use, avoid "energy conserving" oils, weight as specified in manual and an oil you can get easily while on the road when a change is due. Synthetics don't necessarily mean more miles between changes when a single sump is used (tranny, clutch and engine lubed by the same oil).