I've been looking all over the place and can't seem to find a straight answer. I've seen anything from 10.2 US gallons to 15.9 US gallons. I'd like to think that a big car like a '97 Leg Wagon would have the bigger of the two. I have noticed that from a quarter tank on the gauge it usually takes 8-9 gallons to fill back up, which would mean I have another 6-7 gallons left after I hit a quarter tank. I wanna know exactly how big it is so I don't end up running dry on the freeway thinking I had more than I really do. Thanks!