John Robbins wrote: > > The reason I suggested 5w40 over 15w50 is that the 5w40 is the same > thing as Mobil Delvac 1....
..and probably has enough TBN to go 25,000 miles on higher sulphur fuel. Diesel truck oil is overkill, but then again, some people would say synthetic oil is overkill. If you are going to pay $4 a quart, may as well get the best, and that's 5W40 diesel oil. Look for the CI-4 rating (or has that been superceded now?) I wonder how long it would take to deplete the buffering agents in 15W50 with an OM617 running ULSD fuel? I bet you could go at least 15k on that stuff with good piston rings. Mitch. _______________________________________ http://www.okiebenz.com For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
