Full tank measurements aren't that accurate and it depends on your driving. A full tank is around 18 gallons but I usually fill up around 14. Around town and short distances on the freeway, I get around 200 on a full tank with a 95, 3.0 and auto. I average about 14-15 for my tank and a recent trip I averaged about 17.5 just freeway driving. I'm also running 31's AT, so that doesn't help.