Which is the best oil to use ?

[Prepper]

I have been doing a little research on which engine oil is best for UTV engines.  There seems to be some disagreement over using a good quality regular engine oil, and the necessity of using "M2" (or wet clutch suitable) oil.  My understanding is the "wet clutch" suitable oil has less friction reduction properties (hence a more responsive clutch with less slippage).  While less friction reduction properties would seem to be better for the wet clutch... it would not be best for the internal engine parts like camshaft bearings and other moving parts where friction is detrimental and would lead to premature failure.  Some folks swear you need M2 oil, while others say they have been using regular motor oil for years and their clutch is just fine.  Could they both be right ???

Any thoughts ?

 

[T-boss 410]

I didn't take any chances. I used what the manual calls for, which was oil for clutches.

[Joe Breaux]

I use  CASTROL ACTEVO  .Wet clutch approved  10w40. Have used it for years in all my ATVS ..Never fried a clutch yet. Buy it by the big jug at Wallyworld.  I did see a guy put STP in his Honda once..clutch began slipping in hours .

[Joe Breaux]

Just changed my oil in my MSU 500..boy it was dirty..it's dusty ,very dusty here when it doesn't rain. Used Actevo 10w40 JASO M2  wet clutch oil..manual says 2 qts but it took 2 1/2 qts to get it where I feel comfortable..Some shops recommend 3 qts or more but I just can't see it..crank spinning in oil can't be. Good

[tipoblanco]

I just started using Mobil1 4t motorcycle oil 10w40 in my Bighorn 550,it doesnt have wet clutches but the oil is rated for wet clutch,mine lubricates gearbox and engine with a cvt