The Opoc internal combustion engine design, which can improve fuel economy by up to 50 percent, attracts $23.5 million in funding from Bill Gates and Vinod Khosla.
Automotive News reports on a new engine from EcoMotors.
EcoMotors is concocting an engine with two pistons in one honking cylinder. It harks back to what plane engineers tinkered with in the 1930s.
EcoMotors says it can hit 100 miles per gallon by 2011. At that rate, you could get across the country and only have to stop once for gas.