Gas mileage is affected by so many things. You'd be amazed how much it can change by just taking it a little easier on the gas pedal, or driving more highway and less city, or not idling too much...ect...ect. Being the owner of a 98 Outback, I see nothing crazy about any of the MPG you've posted. Your "best ever" of 23.44 is lower than my best ever of just over 27.....and I didn't waste my time or money on some revolutionary device




Dave