One thing to consider regarding ALL of the so-called fuel saving devices.....the "gas-guzzler" tax.
If any of this stuff works, why wouldn't the new car manufacturers use it on vehicles that are subject to the gas guzzler tax? :rolleyes:
The only aftermarket fuel saving device that I have seen in 40 plus years of working on gasoline engines that works is readily available in your local supermarket.....by the dozen. They come in both brown and white colors. Place one between your foot and the footfeed. If you don't break the device, you will save fuel. :p
Jon.