100% complete. Finished it up by winning the Roadster Endurance race. Being the last race, I actually won four cars:
1. Miata, for winning the race
2. Formula car for completing all of the endurance races
3. Formula car for completing all of simulation mode
4. Formula car for finishing 100% of the game
I think I'll put that game away for a while, I'm kinda tired of it now. 