Group fill ups by trip
 

I'm not sure where to ask this and this seems like the best option, so here goes.

I'd like to group fill ups and see the grouping in the Recent Fuel-ups graph and the Log Book.

Let's say I'm going to city X. I fill up before I leave town so I can record my in town miles. I then jump of the highway and fill up a few times before I arrive. When I arrive, I fill up to record my highway miles, then repeat on the way home. Now when I'm home, I'd like to log in to Fuelly and select the highway fill ups and group them as City X Trip. Fuelly will show a bracket at the top of the graph and the left of the log book to show those belong to a group. But why?

Now I want to say Fuelly, show me my trips to City X and tell me what my mileage is for those trips. How does that compare to my in town driving? How does that compare to City Y? What's my cost for those trips and my cost/mile?

What does everyone think? Waste of time?

Thanks
-Eric