My 2009 has 50,000 miles on it and doesn't use a drop of oil. I've always used 5W-30.
Actually, 5 qts of 5W-30 and a quart of 10W-30. Mobile-1 synthetic with Pure One filter.
The 5W-20 is too thin and causing premature wear of piston ring. Strickly my speculation, of course.
2009 JK Rubicon
Shrockworks Mid-width, Warn 9.5Ti; Skid Row Engine Skid, LCA & Evaporator Skid; Rock Hard Gas Tank Skid; Warn Stainless Steel Diff Skids, 11,000# Pull-Pal. Uniden 520XL CB; 1" Front & 1/2" Coil Spacer Rear; Aeroforce Interceptor, Valentine 1.
Moab - TJ-4/2006, TJ-5/2008, 4/2009, 5/2011, 4/2013, 5/2016, 4/2017
Ouray - TJ-8/2007
Rubicon - TJ-9/2008
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