I'm glad I have a diesel. 42 gallon tank (159 liters) and 22mpg highway. That means I can travel over 900 miles or 1400km to a tank. Plus I can use fuel oil (home heating oil or dyed diesel) in an emergency, which is easier and safer to store than gas.

Do they make the Mega Cab Dodge with the Cummins diesel? I know the old 5.9L cummins with the 3.42 rear would get about the same mileage as my truck and you could order that with a 52 gallon (197 Liter) tank [the regular tank plus an aux tank]. Tough to beat as far as overall range goes.