Made a Difference
Thanks for earlier advice: Check it~ After about a year of towing without a Topper on my Pickup --> Average Miles per Gallon === 10 (+ or - .3) depending on driving style, speed, terrain, e...
Forum Discussion
Diesels already get fantastic mileage, so probably won't make much difference. Like the OP, I gained about ten percent by adding a topper to a couple of gas tow vehicles.
