I have a 2007 yamaha ATV and in the owners man it specs a SE,SF,SG Type or HIGHER oil. What does this mean? will Rotella T work? It has an automatic wet clutch. It also says a 20w40 but no one sells that weight exept Yamaha and Yamaha prices.
From my jug of Rotella T 15W-40 Triple Protection, which I use in my 2007 Goldwing:
"Meets API Service: CJ-4, CI-4 Plus, CH-4, CG-4, CF-4/SM, SL, SJ"
The "or Higher" part of that permits the use of SJ, SL and SM.
Rotella would work well in your bike. Lots of people use it.