I have driven a ford , dodge and chevy. with diesel engine and a dodge with a V10 , the ford got the best mpg ,the diesel dodge pulled the best and the chevy. was the quickest ! the V-10 pulled good but 7 mpg ! I also have between 47 and 50 other trucks on the road all are light trucks most p/u , some vans and a couple stake body ! we run them at least 150000 and like to make 200000 miles , we use synthetic oil and trans. fluid for everything , change trans. fluid every 25000 miles and 98% of our trucks go the distance without trans failure , we have a good mix of chevy. , dodge , ford and 2 Toyota all are automatic ! all are loaded heavy all the time whether towing or not we are mechanical contractors ! stick with 3/4 ton or 1 ton for towing , maintance is the key to long life of a truck !