Yes I have did about 3 days of research on this issue of putting the amsoil ATV oil in my rubicon.
I can tell you this... Im more confused now than when I had no clue at all..
so please IF YOU OWN A RUBICON, and HAVE USED THE AMSOIL ATV OIL.
please tell me your results...

Not your buddies results, Not what some shop dude told you would happen, Not what you heard on the interent 4 years ago etc....

Just tell me your results from using it in your rubicon...Thank you, and I hope this dont sound harsh...

 

Well, my buddy's shop dude read on the internet about.........
Just kidding. I am thinking of putting it in my Rincon also. I have read about others using it but I have no firsthand knowledge....yet.

 

I have used the same oil as we use in our tractors Amsoil 15w-40 since I have had my rubicon. 4400 miles only changed the oil 3 times and no problems. There is a slight tick at idle but from what I have heard on here that is normal.