Originally Posted by bdd1469
If I was borrowing a snowmobile that was known to eat crankshafts and bearings on a regular basis, I would run what ever the owner requested I use.
The rotax tripples of that era had a problem eating cranks. I would guess the one you are riding has been fixed and had the update done. I would still ask the owner what he uses.
missed the part where he said it wasn't his...put whatever the owners wants in it...with that being said, all todays oils are mixable