I can't find my owners manual right now, but I think it says 5W30 or motor oil anyway. That was printed before Artic Cat came out with their own special $20 gallon synthetic oil stuff. My one dealer said to use motor oil. Other artic cat dealer says to use something formulated for use in clutches. Says some detergents etc, not good for clutch/trans. The mechanic at the yamaha dealer which I know real well says to use what ever I have been using...dont switch.
I have had to adjust the clutch some what, just figured I was too lazy to down shift at the right time. $20 a gallon is kinda spendy, but so are 4 wheeler parts











