When you add oxygen to a fire, the flame grows. This same principle happens in your engine. Adding ethanol to your fuel adds oxygen to the fuel. This additional oxygen helps your engine to more fully combust the gasoline. This results in fewer harmful tailpipe emissions like carbon monoxide, volatile organic compounds and other toxic components. The American Lung Association of Metropolitan Chicago credits ethanol-blended fuel with reducing smog-forming emissions there by 25% since 1990.
In addition to clean air benefits, E85 is a "Renewable Fuel." Why is it considered renewable? Ethanol is made from grain produced on farms across the country. Although ethanol can be produced from a variety of grains, today it is made primarily from corn. The energy of sun is captured in the corn as it grows. When the corn is processed into ethanol, the energy of the sun is converted to ethanol. The following season, a new crop is planted and more fuel and energy are harvested.
Contrast this to the production of crude oil buried deep within the earth's core. The oil we're burning took hundreds of millions of years to form. Once extracted from the ground, the oil is not renewed... at least for another couple hundred million years or so.
When burned, fossil fuels release carbon, once locked deep within the earth's core, into the atmosphere. Science points to these releases as one of the leading causes of global warming.
Unlike fossil fuels, E85 actually reduces greenhouse gas (GHG) emissions. The grain or other biomass used to make ethanol absorbs carbon dioxide as it grows.
As you stand at the pump, choose to do the world some good.