Most automotive engines burn an average of only 85% of the fuel that passes through them. The rest is lost in the form of unburned hydrocarbons resulting in less energy, lower MPG and increased Greenhouse Gas Emissions. Mileage Maxx patented formula allows the unused hydrocarbons that would otherwise become pollutants to be cleanly burned. This means more power from the same amount of fuel, increased MPG and lower Greenhouse Gas Emissions.