Why do I only buy non-ethanol gasoline? Here's a video I shot to demonstrate why. I also forgot to mention in the video that alcohol in fuel lowers the boiling point of fuel which makes it easier to vaporize fuel in a fuel line which, ones vaporized, is harder for a fuel pump to pump a vapor. They are designed to pump liquid fuel. Thus, creating a "vapor lock" situation where the engine is being starved of fuel.