Then for most of the year I drive a 98 Jeep Grand Cherokee... 5.9 Limited. It's loaded and runs surprisingly decent. But gas mileage is like 10 miles to the gallon. Oddly enough the Camaro with a larger engine gets better gas mileage...Go figure.
There's a reason coefficients of drag are a concern for automobiles, you know, and it's not because of looks.
The 1700-ish pounds extra weight on the GC doesn't help any, either.