I found out about Motor City towards the end. I got to play for about 2 1/2 months and I loved it. Too bad they took it offline. I wish they'd sell the game rights off so someone else could run it on public servers.
I played Motor City Online every day for almost 2 years... I had so many great moments in that game. It was a real community of car lovers. At the end, they added a Supra and an Eclipse... The game started to fall at that moment.
Some people are working on a mod to recreate MCO from another game, not sur what game it is but it looks good. You can do a search for "MCO Mod" google and you will probably find it.