This may sound dumb, but lets start at the very basics. How are you calculating your gas mileage? I ask because a lot of people that claim they are getting poor mileage actually aren't calculating it correctly. One way to do it(if you haven't been)is to zero your trip meter at fill up. At the next fill up divide the gallons used to fill your tank by the miles you drove since your last fill up. You should get a close average MPG for the previous tank full. Some people calculate mileage by looking at their gas gauge(don't laugh, my father was one of them and he's an accountant!)which is obviously the wrong way. I get on average with the many V6 Contours I've had 23-28 MPG with an auto and 28-31 MPg with a 5spd.
