Lol. Fabulous answer to the math, with nice humour! Unless the Gas industry learns how to make new Gas on the fly, Lion will continue to shine also because of the amazingly different ways that it's energy losses can be replenished (wind, water, sun, vibration...), even while it's doing its thing.

So, GP's comment of "develop the tech that seems impossible as the biggininng" (typo included) is the important part. It might be that in the future, because the motors and other moving parts become increasigly efficient (& are already much better than a combustion engine) then less energy is required for the same resulting work. Even more so, the ingenious ways that energy can be 'reharvested' to flow back into the system could in fact allow us to develop something that seems impossible...simply because we're harvesting energy and pouring it into our Lion dependant system better than Gas ever can.