Let’s just say the science on ethanol blends in fuel is far from settled. The principle behind pouring alcohol in the gas tank is as follows: When alcohol is added to a gas tank with water and gasoline in it, the alcohol sinks to the. This is a huge area of controversy with both sides claiming the other is twisting data. Some groups claim ethanol reduces vehicle emissions, but some studies have found they actually produce more carbon. As you probably know, combustion engines dont run. In fact, certain manufacturers will void the factory warranty if you use E15.Įthanol isn’t just harmful to cars, there are serious concerns about what it does environmentally. Since ethanol fuels are alcohol-based, they naturally absorb moisture (e.g. Some engines, particularly smaller ones like you find on motorcycles, can run lean thanks to ethanol. Ethanol will mix with water, which means gasoline-ethanol blends can hold water. That separation of water from the ethanol in gas which can make gas tanks rot can also cause engines to stall out or lead to serious engine damage. Of course, if not detected, that could lead to a fire. It can also allow condensation in your fuel, because ethanol is hygroscopic or it can absorb water from the air around it, causing the gas tank or other components to corrode from the inside out. The corrosive nature of the stuff can eat through gas tanks, fuel pumps, fuel lines, gaskets, etc. If you own a classic car, know that ethanol can be absolutely destructive. Does ethanol damage small engines Ethanol will start to absorb water over time, leading to poor engine performance.
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