Could we get more trend data in the form of graphs? You are collecting a lot of information with each fuel-up (and could collect a bit more although I realize there is always the tension between collecting data and keeping it quick and easy). I wonder how hard it would be to present other graph pages under the general MPG page - such as $/Gal.
Obviously, the $/gal data is optional so it isn't as complete as the MPG. Another data set that would be interesting and useful would be regional cost of fuel. At it's simplest, I think it would require a state drop down on the fuel up form. Maybe an optional City/Town field. And I think a dropdown for Octane rating would be useful also. Then we could have national real-time fuel price maps as well as trendlines for fuel prices .. Just wondering ...