For every two minutes a car is idling, it uses about the same amount of fuel it takes to go about one mile. Research indicates that the average driver idles their car five to 10 minutes a day.  Idling gets ZERO miles per gallon.  Idling REDUCES your miles per gallon! When you treat your gas with Gas Saver you condition the fuel to promote a more complete burn in the combustion chamber. Treating your gas with Gas Saver saves fuel even when you are idling!