My '94 Ford Tempo w/ 2.3 4cyl/ automatic runs great, shifts fine and it has 4 correctly inflated brand new tires, fronts are winterforce snow tires... yet it seemed like it was drinking a little to much gas, so I did a few fill ups and did the math. 21.82 MPG is all it is getting, what could cause this? reviews claim at least 30 MPG for this car. I'd be happy w/ 25 but my brother had a 2.9 V6 ranger 4x4 that got 20 MPG in 4X4, and 24 in 2wd..