gnjohn, I just went through this dilemma. I was looking for a 0w40 JASO MA for my snowmobile but didn't want to spent the $20/L for Yamahalube 0w40. I decided to go with Mystik JT-4 0w40. it is $9.99/L reg price and goes on sale for $6.99/L which is pretty reasonable in my opinion. We still don't have any snow, so haven't tried it out yet.