So I'm currently getting at worst 180 miles per tank and at best 220 miles per tank. I drive 60/40 freeway (30 miles each day) and surface streets. I usually keep it in 4th gear (between 2500 and 2800 rpms @75-80mph) on the freeway if I need to maneuver and on 5th (2000 rpms @75-80mph) if it's just straight cruising. Before I go to get the car dynoed, do you fine fellow stangers think I'm running too rich? Should I be geting more mileage out of my tank?
The engine has 53000 miles on it and I fill it up with 87 or 91 at the pump. I have my mechanic change the oil every 3000 miles and this time I went after 3400 miles and the oil (5-20) came out black.
The engine has 53000 miles on it and I fill it up with 87 or 91 at the pump. I have my mechanic change the oil every 3000 miles and this time I went after 3400 miles and the oil (5-20) came out black.


true true.
