I'm buying a '66 convertible mustang in California and driving it to Charleston SC. The trip is a little under 2500 miles. The owner suggested the car got 27 mpg on the highway. Does this sound right? If so, then I'm looking at about 93 gallons to make the trip from sea to shining sea...which is going to be a great time for me to bond with the car. I'm figuring on driving a little over 800 miles a day...total of 3 days.