$50 for 25% mpg improvement? Not bad

How much would you pay to bump up your car's miles per gallon rating up by 25 percent? Back in 1974, Car and Driver discovered that just $11 (about $50 when adjusted for inflation) was enough to make a Ford Pinto achieve this increase. The changes, discovered and posted by our friends at Ecomodder, didn't touch the engine and included removing fan blades, installing a front air dam and partially blocking the grill, were cheap and effective. Not all can be performed on today's vehicles, but it just goes to show that even an economy car can be made more so by someone with the skills and a few bucks at hand.

[Source: Ecomodder / thanks to Darin]