What Weight Oil Do You Use In A Harley Davidson Transmission?
What Weight Oil Do You Use In A Harley Davidson Transmission? Our answer: It is perfectly acceptable to use 75W-140 gear oil in Harley-Davidson transmissions. What weight oil do I use in my Harley transmission? The optimum product would be Mobil 1 RacingTM 4T 10W-40 motorcycle oil, but it is also okay to use Mobil