While on the subject of the database I thought that I'd just add a couple of comments
The No 1 rated vehicle is ( ahem ) subject to a little scrutiny perhaps.
Farther down the list is a 2nd vehicle, from the same owner, with a more realistic rating but listing 2 tanks in 20,000 miles ( ? ).

A friend who has posted here in the past, Carbot, is in the process of entering his tank-by-tank results on his 04 Prius which he has kept by hand for business reasons. He will go from off the list to No 1 in total miles in one 'swell foop' . 166,000 miles in 45 months.