Larger stationary engines are typically far more efficient than the engines that we find in our cars. Natgas is up to 55% efficient, where cars are 35% at the t

Larger stationary engines are typically far more efficient than the engines that we find in our cars. Natgas is up to 55% efficient, where cars are 35% at the top-end. On top of that, the fuel you use in your car has to be transported to your gas station by another car. Natgas and coal are transported over pipes and rails.