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Following on a story we ran last week, BMW Research and Engineering came up with a novel way to use a car's excess heat energy to reduce its need for combustion energy. The Turbosteamer (no, not the similarly named carpet cleaner) uses fluid heated by the car's exhaust to generate steam that's used to power the engine. The company says more than 80 percent of heat energy contained in the exhaust gases can be recycled using this technology. The test rig combines the system with a 1.8 liter BMW four-cylinder engine, resulting in reduced fuel consumption of up to 15 percent while adding 13 horsepower and 15 ft-lbs. of torque. That, and all the Oolong tea you can drink.

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