- Dec 16, 2006
I have a couple of vintage yamaha 2 stroke dirt bikes and hate spending $9.00 a quart for Yamalube R. someone mentioned trying Rotella T instead at $9.00 a gallon. at my local Mart store I noticed Rotella makes 15w-40 as well as a 80w gear oil. I am confused should I put the gear oil in my motor or the 15w-40 motor oil? or should I try something else. the goal here is to use a cheaper quality oil.