And naturally, it constantly takes longer than you believe it will. We've all seen those rentable relocating trucks promoting their economical rates in huge, splashy numbers on the side. While those numbers look low, bear in mind that these promoted rates do not represent what you'll really pay. At minimum, you'll have to load the truck's gas storage tank. Considered that these vehicles typically obtain an MPG rate someplace in the reduced teens, gas costs accumulate quickly.