And obviously, it always takes longer than you believe it will. We've all seen those rentable moving trucks promoting their low-cost prices in large, splashy numbers on the side. While those numbers look low, keep in mind that these promoted rates do not represent what you'll really pay. At minimum, you'll have to fill up the vehicle's gas tank. Considered that these vehicles commonly obtain an MPG rate somewhere in the reduced teenagers, gas prices add up quickly.