I use the supertech full synthetic ATV that is JASO MA2 certified (safe for wet clutches). It used to be $5/qt, now its like 7 but never have any problems with it.
I use T4 in most of my equipment, diesel truck. I buy it in the 5 gallon bucks when they go on sale or theres a rebate. I use walmart synthetic in most of my other things including the ATVs with good results and a significant cost savings.