This car has poor fuel mileage, I don't care what the specs say, and I am taking into consideration that these are usually exaggerated. I traded a 2003 Mercury Sable with 40k something miles on it, thinking i would get a bit better gas mileage with a newer vehicle, six cylinder but should be better in mileage as smaller vehicle and less weight and other factors. Darn things is eating me alive, i have decided to sell the thing and am driving my other vehicle in the mean time, a 2001 Ford Taurus (73000 miles) a larger car that is getting better mileage than this thing.
Just a wild guess, but bet your transmission or key factors in drive train, in this thing is causing the problem. How can a heavier, older, car get better gas mileage, both in city and highway?