The lowest mpg I've gotten is 17.5. I always run stock size tires, so my odometer is apparently correct. Last summer I checked my mileage with three fills in a row on stock spark plugs with 77K miles and got 19.73-19.97. This week with new plugs after 9K miles I filled up and drove 304.6 miles. It took 15.44 gallons to refill, so that comes to 19.73 mpg. I guess it could be the summer fuel mix, but whatever it is, I like it.

Mark Griffin