hard to replace, I would change to synthetic oil REDLINE Brand after running Marvel Mystery oil thru it for a few hundred miles, first try some "Lifter Lube" additive, then Marvel Mystery oil then change oil and filter to REDLINE

__________________
Jerry

2004 SL500 Black 55K Miles
2002 s500 Black 90K Miles
1986 300E Gold 233K Miles
1966 Twin Cessna 320D
1989 Jeep Cherokee 233K Miles
1994 Ford Van E150 399K Miles