Can oil affect gas mileage?
So I got my 02 auto a couple of months back. It had been sitting under a tree for 2 months and I didn't ask my friend when the last time he changed his oil was. So I drive around getting around 220 miles per tank. I ended up changing the oil about 2 weeks ago. Now every time I fill my tank (weekly) I reset my trip odometer to see how many miles I get to the tank. When I changed the oil it was pretty black plus it was running low. So now I have fresh oil. And this Friday when I filled my tank I checked my odometer and it had 260 miles I could have messed up with the trip odometer though. Could the oil change have to do a lot with mpg? The car is not completely stock. BBK headers and throttle body, tb spacer, pypes dual exhaust , and CAI.