Postby DPF » Fri May 07, 2010 8:11 am
I have done tank-ful comparisons using premium and regular to see if there were any kind of mileage improvement to justify the higher cost/gallon. No real difference to speak of. Between a .1-.2 mpg difference, which is within a range that can be due to the mood I was in that week and how heavy I was on the pedal.
I ran regular in my 96 Max for years with this engine (3.0l version) and it loved it.
I can sense no difference in power either. I'm perfectly happy running regular. Maybe a tank of Premium every few weeks to maybe clean things out a bit, that's about it.
-DPF