Yes brother obviously thats the only way to check to reset on every refill
I bought new city and filled till auto fill , reset meter ..used full tank.. Refilled from same pump ..
Then secodn time i used half ank and get refilled and same case that meter showed 16.5 but manually it was 14.5.
Well u r also right. My cousin have aspire prosmatec and his meter also shows exact avg of around 13. I think there are more factors to it which we may not knw. Seems like prosmatec shows correct avg
.