I commute in rush hour traffic (25 miles in hour to hour and half) twice a day and I still get at least 300 miles to a tank. I usually fill up at around 310 miles and I've never had the fuel light come on. Generally takes just shy of 20 gals to fill. I've found that if I use super instead of regular it not only runs better, but I get a mile to mile and half more per gallon. Maybe Washington gas is better?