The ford 150 without or with the Eco boost. But the Eco boost is expensive to repair. The gas mileage changes greatly once you load it up. Then mileage is not so great. The dodge deasel is good, but that's deasel not gas. It really depends on what you are planning to use the vehicle for. There are some Oder trucks that get better gas mileage then the new ones. two company's have been served with law suits because their vehicles weren't even close to the mileage the advertising claimed.