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Not disputing the energy rating of petrol that you mentioned, I just think you are missing HUGE amounts of wastage that goes into creating the fuel for the human bod. And the conversion of that fuel by the human body is also quite inneficient as well..everything from heat disapation to the mass consumed to fuel created is way low on the efficiency scale. (PS I knew where the petrochemicals come form [img]smile.gif[/img] )
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