Best oil
JK Enthusiast
Joined: Sep 2009
Posts: 208
Likes: 0
From: BR & BMT
Originally Posted by TieRod
My mechanic sez to use the 5W-20 as per mfg's recommendations. This is due to the closer bearing tolerances on newer engines. A thinner oil will flow in tighter passages and provide proper lubrication. Makes sense to me; I use Mobil 1 and change yearly or 5k miles.
JK Enthusiast
Joined: Jan 2011
Posts: 221
Likes: 0
From: Searcy, AR
Amsoil 0w-20 signature series. Not only are you supposed to get 25000 miles between oil changes, my engine is noticeably smoother at higher rpms than before. I run amsoil for every fluid my jeep needs