> ...gasoline gallon has 33kW worth of energy in it... kW are a unit of power (energy/time, 1 W = 1 Joule/s), which is not relevant to measure energy content (

> ...gasoline gallon has 33kW worth of energy in it... kW are a unit of power (energy/time, 1 W = 1 Joule/s), which is not relevant to measure energy content (for a gallon of gas). You'd want plain Joules for that.