For reference, you ought to burn maybe 18 gallons per hour or so wide open. At 70+, that gives you close to 140 miles round-trip. If you back off to a reasonable cruising speed, you can stretch that considerably. My 08 has a 33 gallon tank and I have never approached burning that much fuel in one day, even running all over Guntersville or Lay (lay is about 50 miles from one end to the other).2008 Pantera Classic2014 Mercury Pro XS 200