[Magister]

I tried a lot of things to have a more accurate value, using wideband O2 sensor value, lambda value, etc.

After thousands of logs, I saw that the correction using this PIDs was not really worth it. About all the corrections were between 0.97 and 1.03, so adding time to ask for these PID (some car do not have wideband O2 sensor anyway) was a little bit useless. Especially that at the end, the average was about right.

I found that gas that have 0% ethanol or 10% ethanol, having winter tires, being -30F outside, having tires at 44psi instead of 22 psi, etc, all have greater influence on the fuel consumption, sometimes as more as 10%.