Comment by arximboldi

that's a misleading equivalence because you're also not considering the energy it took to grow the plants that produce that oil millennia ago. perhaps comparing to biodiesel or alike would be better. but even then it underestimates the efficiency of the human body, because food contains not only the energy we use, but also the materials to build the body itself. so you'd need to account for the inputs into that biodiesel and then all the extraction of materials and production of the machine itself. biology is amazing