[Somender Singh] claims that his invention makes an engine cleaner, quieter and colder...while using up to 20 percent less gas. So far, all Singh's invention has earned him is a few polite rejection letters from presidents, professors and auto manufacturers. I am...no man with letters after his name or fancy institutions, and what I have invented is really very simple," he admits. Remember that the internal combustion engine is itself hardly rocket science. The internal combustion engine (ICE) has been with us for about 200 years. The basic concept-the boom that turns a crank-has not really changed at all. The efficiency of that bang had stalled out at around 28 percent. The vast majority of the fuel was dissipated as engine heat or exhaust. Singh knew that ... the combustion chamber [was where] fuel was turned to bang. He modified a motorcycle, then a two-stroke, then a four-stroke, then a car, then 50 cars. Singh applied for a patent in January 1999, and the U.S. Patent Office issued him No. 6237579 in May 2001. Finally he was allowed to bring his engines and hook them to a Benz EC-70 dynamometer with a five-gas analyzer and a Benz gravimetric fuel-measuring device. At between 2,000 and 2,800 rpm, Singh's modified engine used between 10 and 42 percent less fuel than its unmodified twin, with no appreciable losses in torque or power.