Ultimately intended for drivers who already own 20-30 mpg cars and not looking to replace them, the Fuel Mizer is nothing more than a monitoring system that keeps motorists mindful of their driving habits. So if you've got a particularly heavy foot, the Fuel Mizer will alert you to overly wasteful vehicle operation by sounding a beep. But the real question is this. At the end of the day, does the Fuel Mizer amount to measurable savings, or is it just another hopeless tech toy for would-be gadgeteers? In this GreenEnergyTV-featured video Consumer Reports and average drivers put the Fuel Mizer to the test. Check out the flick and decide for yourself.