I have a Mazda 3, which didn't have the fuel computer display (shows you remaining mileage, current mpg etc). After I bought it I found out that by doing a lit

I have a Mazda 3, which didn't have the fuel computer display (shows you remaining mileage, current mpg etc). After I bought it I found out that by doing a little dance with the buttons and turning it on and off I could enable it. Now the only difference is that mine has a blank button to cycle through it rather than one that says "Fuel Comp".