darbike, what your were told is at least partially true. The reference to auto oil being 10W30, 5W30, 0W40 etc. Due to fuel mileage concerns in late model cars & light trucks the oil spec for those has been changed to "energy conserving". Those particular oil's could (not all do though) contain molybdenum (moly). There is great concern that high concentrations of moly in a wet clutch motorcycle could cause some clutch slippage. That hasn't really ever been totally proven but there is actually data supporting both sides on that matter. Most "energy conserving" oil's contain less phosphorous also & phosphorous is a good addition to motorcycles that sit forextended periods.Can some one help meplease. I was told that I should use motorcycle oil in my Wing and notregular auto oil because of the wet clutch is thistrue or not. Or can I use regular auto oil in my bike. Thank you
Jason, actually a lot of motor oils are a higher viscosity than gear oil. Gear oil's use a different rating system & viscosity chart. A 75 weight gear oil is about equal to 10-15 weight motor oil, 90 weight gear oil is close to 40-50 weight motor oil. The big difference is the additive package & pour points, there are other subtle differences also as most gear oil contains a high concentration of sulfur based products (that's what gives it that unique smell)We can't use gear oil in the engine eitherbecause it's too thick.