Now that gas is ridiculously expensive, it might help to own a PLX Kiwi to make your vehicle more fuel efficient. The company claims that you can improve your mpg by up to 33%. The device can be mounted anywhere in your vehicle, and bases your personal “Kiwi score” on smoothness, drag, acceleration, and de-acceleration. The display shows your mpg, trip summary, and causes of engine problems. While it cannot be used with any vehicle earlier than 1996, it will certainly help you not only use less fuel but save the planet by reducing carbon dioxide emissions as well. If you cannot afford the $300.00 price tag, at the very least TAKE YOUR FOOT OFF THAT GAS PETAL!