Oxygen is needed for either to put out energy.

cellular respiration
C6H12O6 + 6 O2 = 6 CO2 + 6 H2O + energy

gasoline combustion
2 C6H14 + 19 O2 = 12 CO2 + 14 H2O

(I hope I balanced the equations correctly)

Seems like they work pretty much the same.

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Insanity: doing the same thing over and over again and expecting different results.
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