Readily-available chemical added to gas tank in small proportion improves the fuel's ability to vaporize completely by reducing the surface tension that inhibits vaporization of some fuel droplets.
Ernest Griesel - yes, that is his birth name - drives around in a diesel bus whose diesel engine he has converted to run on grease from restaurants. It burns well and clean. The exhaust smells like French fries. He shares easy-to-follow conversion instructions.
Paul Lowrance proposes a solid state method for extracting energy from the motion of atoms in matter, resulting in cooling of the matter, to be regenerated from the ambient surrounding temperature. Says model is based on existing laws of physics.
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