Originally Posted by skucera

I think that getting 9-10 MPG in city stop-and-go driving is not so unusual, especially if you try to keep up with nimbler cars. I usually get ~14 mpg in my mix of 80% highway and 20% city driving, and I've gotten 16 mpg at 70-75 mph freeway cruising, and 12 mpg towing a loaded 3500 lb. horse trailer. Aerodynamics are a big factor too: I've had a gain of 2 mpg with a tailwind in our old RRC versus going into the headwind the other direction. The RRC is a rolling garden shed, and the Disco is worse with its high roofline that steps up progressively toward the tail.

As has been mentioned, the biggest variable is the driver, but tires with low inflation pressures have a staggering effect, as do oversize off-road tires. Nobody has mentioned tires or pressures, so that's an open question.

Scott