Just to add a bit more, we're very hesitant to add any sort of Top Ten lists or leaderboards to the site. Fuelly isn't a competition, and we don't want competitive behavior to compromise collecting good data. There's some more explanation of our thinking about this in the FAQ: Why don't you list everything in order of best fuel economy?
I have close to 300 gas ups ( not always 100% fills ) on my Magnum, I had about 150 uploaded here, but I have started to condence them down to cover fill up to fill because how the site handles part fills.
I'll be adding the rest of my fills as I have time.
I don't think you (that is, Fuelly site bosses) need to create Top Ten lists or otherwise provide shout-outs that single out the "best" achievers.
You just need to provide a search/data mining function that provides access to all the data, and lets users navigate that data as fits their requirements.
Whether you like it or not, people ARE comparing and ranking their own performance relative to others, it's just that right now it's tedious and painful, instead of easy and flexible. If the OP wants to see what other M5 owners are getting, but only if they have >100 fill-ups and a manual transmission, there's no reason he shouldn't be able to do that. How he uses the results is up to him.
There's nothing stopping anyone from posting "fake" data right now, so I don't see that as an argument against providing additional reporting functions.
I had a glovebox full of 200+ receipts with the miles written on them and had entered about half of them before getting tired. Someday I will have spare energy to go back and finish them to "close the gaps". I don't drive a manual M5, unfortunately.
I documented and uploaded 553 fill-ups fulls on my 2003 4Runner that I just sold recently. 136,940 miles between 8-25-03 and 7-29-09. I've tracked the mpg and fuel cost on all the vehicles I've ever owned. It's a great way to get an early warning on potential vehicle issues.