Ahh ok so it tells you right there, hey you need to let up of the pedal to get better mpg right at that moment. Thank you for your help dirtydave, I was just trying to get a straight forward answer on what exactly it does and how it helps. Cause I was thinking hell I could save the money I'd spend on one by just figuring up my mpg myself from my odometer and gallons of gas out in my civic
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