More research and experiments need to be done using steam produced by waste engine heat and injected into an internal combustion engine. A water tank can be placed in the back of the vehicle, connected to copper tubing at the bottom, to be wrapped around the exhaust pipes from the muffler to the catalytic converter, to convert the water to steam. A thermostat can be used to open when there is enough heat. The steam can be injected at the air intake and other locations. The exhaust system and the tubing, up to and including the catalytic converter, should be painted with high temperature black paint, to help with heat transfer, then covered with aluminum paint, to reduce heat loss. The remainder of the tubing should be painted with aluminum paint, to help reduce heat loss. Watch this video: http://www.hypermilingforum.com/forum/vBTube.php?do=view&vidid=dAkRLjx8FeU