Engine Wear- I’ve asked a few question in the Mobil 1 0W-40 abuse, Eiron. Now I wonder about using M1 tri 15w-50 oil, changed oil/f every 5000 miles. I have a 92-MB-400e-V8 with 96,000 miles. I decided to do a compression test the other day and the average results of the compression in the cylinders is 174 psi or 12.3 kg, all cylinders were very close in compression.
A new engine should be 14 to 16 kg or appox 199 psi or 227 psi and the factory wear limit are 12.5 kg or 177psi. I believe I have more engine wear than I should. I now question the usage of a heavy weight oil as M1 15w/50, I remember I switch to M1 at my first oil change, and Mobil tech suggested I use M1 15w/50 year round (for wear protection), since I live in WV, not a cold or hot climate area. Is my thinking wrong about excessive wear from using M1 15w/50 when looking at the compression numbers and do you believe this excessive engine wear? slowlane
A new engine should be 14 to 16 kg or appox 199 psi or 227 psi and the factory wear limit are 12.5 kg or 177psi. I believe I have more engine wear than I should. I now question the usage of a heavy weight oil as M1 15w/50, I remember I switch to M1 at my first oil change, and Mobil tech suggested I use M1 15w/50 year round (for wear protection), since I live in WV, not a cold or hot climate area. Is my thinking wrong about excessive wear from using M1 15w/50 when looking at the compression numbers and do you believe this excessive engine wear? slowlane