i have owned 4 new rams since 2011.. i put over 150,000 miles on each or more .... . moble 1 extended performance with 1 qt of valvoline 20-50 hi zinc flat tappet oil. never had any issues. i changed the oil @ 15,000 miles always! all 4 have broken exhaust manifold bolts just after the warranty was out ! only 1 had the bad lifter issue and it was over 150k miles and i beat the hell out of it. never added any oil between changes ever!