Eagle2000GT

You cannot use the gage to even estimate gas mileage. I have a truck that gets 14 mpg (calculated correctly). The gage above 1/2 tank moves very slowly. The last half moves very quickly and its completely empty when the gage gets to E. My Mustang gages seems to move consistently above and below half. But it still takes 50 miles to get it to come off F and there's still about 1 1/2 gallons in the tank when the gage hits E. The truck also has a 25 gallon tank while the Mustang has a 15 gallon tank. The only way to accurately measure gas mileage is to fill up both vehicles. Drive the same route. Then fill up both vehicles again to see which one used the most gas.

GrayGT02

Yeah something doesn't sound right. I have a 2007 Eddie Bauer Explorer and it gets around 16 MPG and my mustang usually gets around 20-21 MPG, under the same driving style.

sweger

ive never got any worse than 20 on my 04gt...best tank was 28 driving cross country at 75mph. i think, once, when i filled up before a trip, i topped her off putting 4 gallons in it, and had about 60 miles to it. thats 15mpg, and i was driving super aggressive on back roads and rte 33 over the shenandoah mountains...

like the others say though, you didnt buy the car for fuel economy though, did you? i know i didnt, and was pleasently surprised at what it can get if driven tamely.

MJH78

A lot of variable to this. I get about 16mpg in the summer with no AC. keep in mind this is with ZERO highway driving and a lot of 2-3 mile commutes where my engine never even reaches operating temperature. I drive very conservatively most of the time. In the winter, it's not uncommong for me to get 13mpg. That might seem horrible, and it is, but you have to consider all those 2 mile commutes back and forth from work. The motor NEVER reaches operating temperature on those trips and of course a motor is a total gas hog when it's running colder.