I don't.....running 94 leaves it for fun and stress relief....it gets about the same as my Jeep wrangler with a 258 straight six with 31 super swampers.....more of a "don't want to get the car keyed in the work parking lot thing" for me....lol
Fuel Economy & Mustang just doesn't make sence, unless your driving a Mustang II. Really the 4cyl Mustang's & Capri's (yep I had one of those) are the fuel savers, but if I want fuel economy I'll drive my wifes 01 Honda Civic, or even my 04 Honda Oddessy both of which get way better mileage then my vert but arn't nearly as fun to drive.
I have a long commutte to work (87 miles on way and I know I need to move). Anyway, of the two vehicles I own, it's either the '95 Bronco that gets 15.5 mpg average for the commutte, or the Mustang that gets 24.5 mpg average on the commutte.
I drive mine as a dd and the horrible gas mileage makes me more and more mad...what can I say, getting 13-14mpg takes a tole on a poor college student. Affording books and beer is enough of a hassle
never actually sat down and figured it out but my car probably is better on gas. But then again I'm always on the gas so they may be about the same lol