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I prefer the 15w-50 in the motor because of the "dry start" protection provided by the friction modifier (Molybdenum) it contains. Friction modifiers are a GOOD thing to have in the motor.
V-Twin oils were specifically designed for single sump motorcycles, where the oil supply is shared between the motor, primary and tranny. Because friction modifiers are bad news for clutches, V-Twin oils don't contain them.
Using V-Twin oil in a Harley motor, only serves to deprive your motor of dry-start protection.
V-Twin oils were specifically designed for single sump motorcycles, where the oil supply is shared between the motor, primary and tranny. Because friction modifiers are bad news for clutches, V-Twin oils don't contain them.
Using V-Twin oil in a Harley motor, only serves to deprive your motor of dry-start protection.