I want to pay 2.45 for crying out loud!!! I have to pay just under 3 bucks. You could use anything really as long as it is rated for motorcycle use. The better the oil though usually means the longer your engine will last you so don't go investing in the Stihl Chainsaw brand. :nener:NealB. said:1993 KX125. Is it really necessary to use the high dollar racing oil or will any basic 2 stroke oil work in the gas? I really do not want to continue paying 2.45 cents per gallon of gas.