Thank you for your concern.
First of all, I do know about a few problems concerning the current data, and will mention how I propose to fix them.
First, there are people who have not "switched over" to the new interface, which asks for best/worst and (not recommended) a LMPG. Cars like the following:
http://www.greenhybrid.com/explore/mileage...ails.php?cid=50 therefore do not adequately display mileage trends, and I have resorted to personal messaging these individuals to nicely ask if they would please update their car. I had one person respond negatively, however, who thought this was an unfriendly guesture. I hope that once the changeover is complete, there will be no more "drama."
Secondly, the sample size is too small for some cars. The following car:
http://www.greenhybrid.com/explore/mileage...ails.php?cid=70 has but 0.7 gallons worth of data. That's the ONLY Civic. Besides having the same "problem" as mentioned above, their sample size makes them look like a higher-mileage-vehicle than the Prius. I initially had a sample size bar for each of the cars on the main graph, but since I can't quite put a 100 million value for non-hybrids, I took it off Would it help if I added a transparent bar over the current ones with, perhaps, miles driven as a sample size?
Lastly, I think most of these problems will iron themselves out over time. Once there is more traffic and more data, the averages will become REAL averages.
Is there anything else I can do?