I tow a double stacked trailer (non aluminum, two blades, one sail box and one truck box) with my Nissan Sentra...standard 5 speed, no AC....and get 20-25 mpg's. (without I get 32-34mpg) NO problems! The trailer hitch was a birthday present to myself. <img src="http://www.catsailor.com/forums/images/graemlins/smile.gif" alt="" />