I have to agree with David. The only way I could get 20 mpg out of my '02 is if I drive like I'm following old folks to church. On long trips on flat ground with no wind and cruise on 75 I get about 19. Most of the time 17-18. Less in the wind or if I'm in a hurry.

I have the Edge box and a 4" exhaust. I can't say that they really made much difference in economy. Maybe a little. Towing milage is better than stock if you pull the hills at the speed you would have stock.