Re: 1st Oil Change V8...1.5 months old, 4k+ miles...M1 Synthetic...advice???
Since I only put about 6k miles a year on my car, I think I'm going to use plain old Pennzoil 5W-20 conventional oil, along with a Purolator Pure One oil filter every 6 months. I doubt using synthetic would yield much of an increase in mpg.
2014 Summit 4X4, V8