Partial Fill Screws Up MPG Calc...

[ember1205]

...once you get back to a filled tank.

Why does Fuelly add in the previous gallons of fuel but doesn't bother to add in the previous miles? This is flat-out stupid!

Partial Fill done on 6/26/20 with 312 miles driven and 7.695 gallons of gas.
Full Fill done on 6/29/20 with 181 miles driven and 13.837 gallons of gas.

Fuelly added the fuel together to get 21.532 and then calculated that amount of fuel used over ONLY the 181 miles for the full fill, resulting in 8.41MPG (and nothing entered for the previous fill).

I am completely confused at how the "math" for this site works and have always complained that two consecutive full fills were NOT necessary to calculate MPG so long as at least one full fill had been recorded somewhere in the past. Now I understand why two consecutive ones are required - it's because Fuelly isn't smart enough to track both miles AND fuel quantity as cumulative.

SMH