Since I cant get a straight answer from anyone else, I figured I would ask the pros of snowest. Have two grums running around now (5 yr old and 8 mo old) and the ol supercab with 4 doors isnt cutting it and its time to move up to a crew cab with 4 full doors. Starting looking at used F-150s but with all the incentives and rebates on new trucks I think im gonna go that way. Seeing diesel prices are going down but so are gas I’m wondering if I should go with a 150 gas that will get prob 17mpg avg or spend the little extra coin and get a 250 diesel, get an intake, exhaust and chip and get the "claimed" 20mpg +. Right now the 250s qualify for 0% interest through ford where the 150s don’t. After doing some math I think you get more of a truck going with the 250. If I can get even 4 mpg more the cost difference of gas and diesel pretty much equal out in the end. I know the upkeep on a 250 is gonna be more (oil changes, tires, ect) but do you think its worth it? What have you guys seen for best case mileage on the 250 diesels that have some extra goodies on them? Thanks