Was at advance auto .took pics back of bottles of fram synthetic,fram high mileage synthetic, Mobil 0w30,0w40, Mobil extended performance.
The fram synthetic says sludge protection .what does that mean? Would it clean as good as Mobil extended protection advertising cleans sludge in one oil change? I knew w 0w40 has esters in it. How about the 0w30? Fram synthetic?
The fram synthetic says sludge protection .what does that mean? Would it clean as good as Mobil extended protection advertising cleans sludge in one oil change? I knew w 0w40 has esters in it. How about the 0w30? Fram synthetic?