Ahh, yeah, that makes sense then. So just move the dicimal over from the number I came up with. So 0.065 gallons saved when I EOC. It's amazing car uses so little gas at idle! It equates to about 1/2mpg for me not taking into account fuel used getting the engine going again. 62.6mpg becomes 62.1mpg if I hadn't bothered turning the engine off all those times.