Don't fill the tank

There's some logic behind this tip: less fuel = less weight and so less fuel needed during acceleration.

Half filling the tank will save you some fuel (and make the fill-ups feel less expensive) but it increases the risk of you becoming stranded without fuel. Some drivers are incredibly efficient at ensuring they fill up before they absolutely have to, most though, are not. Are the small savings worth risking being stuck on the side of the road?