With gas prices through the roof, I conducted an investigation of the facts behind how driving style affects fuel economy by using a laptop and the OBDII interface to the engine's computer (ECU). I also address engine modifications and alternative fuels.

If you do insist on wasting your money on useless efficiency modifications, I will sell you a rock and some duct tape for $50 plus shipping and handling.

My supercharged 4.0L Jeep Wrangler kept throwing a P0129 error OBDII code and I needed to figure out how to solve it. Using a USB oscilloscope, a home mechanic can troubleshoot all kinds of electrical issues.