the only differences that I have had in the last 5 weeks....changed oil from Amsoil ASL to PP with a whole bottle of A-RX, and the weather has got a little cooler in the last couple weeks. Mid August, on my vacation, temps were topping out at 101-102 and now the highs are in the high 70's low 80's. no other maintenance has been done. The car has ~45000 miles. The xterra has ~50000, and I would have thought I would see more benifits from the A-rx on this vehicle. 3.5 quart sump, supercharged V-6, some towing, short commutes, cheap fuel, not maintained as well as it should/could be. Maybe I will get to see the big results during the rinse phases.
The Neons oil after ~1k miles still looks new.
The Xterra's oil after ~2k miles is black.....barely see the metal of the dip-stick black.
after doing the math, since changing the oil on July 30th, fuel mileage is up 1.21 mpg better than the three months previous. no change in commute. I know thats not alot, but its about 15 miles more per fill-up, or 60 extra miles a month, 720 miles a year, ~ $130 in fuel savings per year if it were to stay this way.