What is the difference (if any) between the (all of them fully synthetic) Mobil 1 "High Mileage" (for engines over 75K miles), Mobil 1 "Extended Performance" and the regular Mobil 1 (don't remember whether it says "with SuperSyn or not)? They claim "High Mileage" has extra anti-wear, anti-sludge, and higher viscosity to reduce burn-off. How could it have higher viscosity for the same weight ratings - wouldn't that be mislabeling? And would it really have better wear and sludge characteristics than the "Extended Performance"? Or maybe it does, but doesn't last as long? Opinions, please.
- posted
17 years ago