I mean I have 190 plus+ fill-ups and I'm interested in what other high number users are driving to see their choice of vehicles and their mileage data. Yes, I can go to each car and see users by # of fill-ups and that is more helpful when I'm researching real world experience on mileage for X cars.
As far as a competition, I guess that is possible and didn't think about that but i can't imagine people faking data for fill-ups to get on a list! Well, maybe they would.......
That's an interesting variation zencyl, but it's still a contest you can "win". Once we set up any sort of Top 10 anything it creates an incentive to cheat and gets people questioning the credibility of other members.
For example: number two on the list might get mad that number one has a bad odometer reading. Maybe it was a typo of an extra zero that added 100,000 miles to the amount tracked. So number two complains to us about the bad reading and then we'd need to try to get in touch with number one to fix some piece of bad data. As the system works now, a typo or bad entry here or there is no big deal. Once the entries start "counting" beyond personal use, things can get ugly quickly.