I just checked the mileage on my 06 Yamaha Wolverine 450 ATV and figured for kicks I would put it in the mileage database. It is not a motorcycle or car of any type though. I don't really think a top 10 list for the other category would mean much but it would be interesting to see what kind of random gas powered things might get added.
So just adding "other" to the list of types could be a catch-all for any random stuff people have and if there is enough interest in one type of vehicle it could be split off into it's own type.
when you are adding a vehicle to your garage, there is a drop down menue with "gasoline" "diesel" "motorcycle" and "hybrid" to choose from, lucky for us no one admited to having a diesel motorcycle yet, and I haven't started a gaslog yet for my moped that is tecnicaly a hybrid (human/gas), and I think that the reason no motorcycles show up on the top vehicle gas log listing is that it only shows vehicles in the last 60 days or something, and my motorcycle for example hasn't gone thru a full tank of gas yet this summer as it holds almost two gallons.