I used the Cat synthetic oil in my 500i manual - so far, no problems, clutch still works fine, and I put the oil in last spring so it's had plenty of time if it was going to do something bad.

 

Try this:

http://www.alpha-sports.com/cgi-bin/...ce=0&merchant=

 

I thought some one a while back posted that they were running Mobile 1 synthetic .Is that ok for a ATV ?

 

mobil 1 for a car isnt wet clutch compatable, but the mobil 1 motorcycle oil would be, if they make it in 10w40

 

But if you have an auto, it doesn't use the wet clutch (at least not on the 650's.), so any oil is fine.

 

On AC automatics other than the 650, there is a clutch that engages the drive. The belt is always tight and driving, but when you go from a stop, clutches engage to get power to the wheels. The 650 disengages the belt when at idle.

I'd use the proper oil in any of them, just to be safe. You don't have to change it that often to be worried about the price.

 

They do. And I've used it in my 375 and it works just fine. In fact, after 300 miles I changed it and it looked as good as new. I could have kept it in there much longer.

 

Found this, and just passing it along.

http://www.motor-oil-engineers.com/F...lubricants.htm