your 91 2+2 gets bad mileage too? mine was really bad when i bought the car(month and a half ago) but since then it has improved significantly. enough that i actually notice w/o checking gas reciepts. does your car smell of gas every once in a while, because mine did but then it went away and i don't leak any liquid of any kind on the garage floor. if you have any old receipts from the previous owner then check them for sympoms like yours and see what they did.