Literature that is associated with actual vehicles is often provided by designers and manufacturers of such vehicles as they attempt to sell their significant economic outlay to consumers. The footage in the film, Who Killed the Electric Car? showing individuals using such technology and even president George W. Bush attempting, though rather stiltedly, to fill the tank of an alternative fuel vehicle are examples of marketing. It is difficult to actually find documented research on alternative fuel cars, that is conducted by non-vested research parties.

Current technology briefs with regard to the most efficient combustion engines stress their new and improving efficiency over previous models. Yet, these are still combustion engines and they still directly burn fuel.

A lean-burn engines will undoubtedly allow major improvements in efficiency. Leanburn engines are those that operate at high air-to-fuel ratios. The gasoline direct-injection engine (GDI), is an example.... With its higher ratio of...
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