We just returned from our lovely 14 hour drive home last night. We have a Toyota Sienna so our mileage was around 20 mpg, but I spent about $350 on gas. We live in northern MD and filled up a total 7 times if I remember correctly. Once when we were down there because we didn't use Disney transportation, we drove our own car.
Holy smokes! We have a Mazda Tribute and also averaged 20 mpg. 18 hour trip from around Pittsburgh, PA and we only spent $200 in gas a week ago. We filled up 8 times.
Whoop, I have it all listed in Excel, but I am missing 2 fuel stops. 8 fuel stops at about $25 each. I have the 5 stops listed for the way down, but only 3 listed on the way home. I'm missing 2 stops. Listed is $192, so add another $50 approximately for the 2 missing stops gives me $242.
I'd guess you meant $250, not $350? Still wouldn't compute very well in my mind because you are 4 hours closer.