Working As Designed: system not calculating mpg if last fuel up was partial.

[periodictable2]

Mpg should be calculated for the two combined miles and fuel consumption for both fuellings. Why doesn't it show the average mpg when it is easily calculated

[RobertV]

Fuelly was set up on this belief:
http://www.fuelly.com/faq/3/fill-the-tank

However, we have received quite a bit of feedback requesting the calculations be changed. We're considering it and it may roll out in a future update. No ETA at this time to report though.

[kavalley]

That's ridiculous if I may say so! I fueled up locally (partial tank) before a long highway trip so I would not have to pay Thruway prices. Now Fuelly is useless for me... I also fueled up in Michigan before entering Canada as there are extra charges there, so it happened again. You should re-examine this issue.

[RobertV]

Originally Posted by kavalley

That's ridiculous if I may say so! I fueled up locally (partial tank) before a long highway trip so I would not have to pay Thruway prices. Now Fuelly is useless for me... I also fueled up in Michigan before entering Canada as there are extra charges there, so it happened again. You should re-examine this issue.

Did you fill the tank up? From what I've heard, usually when gas prices are less expensive than in the area you're going, one tends to fill-up to avoid running low when in the expensive areas.
Only reason I ask, is because that would not be considered a Partial fill.