i used to get around 21mpg (when car is new) and now i'm getting 17.xxx. i'm not looking at the computer computation. i use the fill up and compute method since i think that's more accurate.
i fill up, reset the trip meter, when it's almost empty, fill up again and get how many miles i got from the trip meter and divide the number of miles to the number of gallons i fueled. Tada!, my MPG. I'm planning on replacing my A/F sensor since someone says that it will improve your MPG. I have the part already but having trouble on how to remove it. Anyone who already changed their A/F sensor and improved the mpg?