I never verified my speedo, but I would assume that it is about the same as yours since we are running the same diameter tires with same model Montero. I will have to let you know about the mpg b/c I haven't paid much attention to it. It definately depends on how you drive. If I drive very smoothly, I seem to get really good mpg, but if I am busting tracks in a hurry, it obviously sucks up the gas. My buddies and I were cutting it close one time for formation here at West Point and I was really moving up a slight incline and used about a quarter tank in a 30 min trip. Sometimes I tend to have a lead foot, so I am sure my mpg is probably better than I usually get in reality, but I find the time to drive normally, I will figure it out for you. I also plan to get a zero to sixty time just for the hell of it and compare it to my brother's 1999 Montero and my Dad's Camaro.

Scottie