My 2009 Honda Accord had an ordinary mpg of around 35. I expected to improve this. So I checked the strain on my tires and incorporated this Effuel Cars Fuel Saver chip. It says it takes around 150 miles to change the PC's ECU. I finished off the tank of fuel and went on a trip to visit my people out of state. It was a 167 miles round trip. My fuel mpg for that excursion was fairly more than...