05 Cobalt, reset DIC ECON, Milage before accurate?

[Rolling7z]

Hello, I am hoping I am posting in the right section.... I was just wondering if anyone even had a rough guess of how many K/M or Miles you need to put on the car before the DIC ECON becomes accurate (or close to it) after it is reset?

Thanks in Advance

 

[YelloEye]

It's an average over time, so the average is correct for the amount of time you've been driving.