Make / Model/ Year averages
It might be fun to have aggregate stats for an entire subset of cars, so that rather than just competing as individual cars, owners of similar whips would be grouped as a whole.
So instead of just comparing my RSX to other RSXs, I could see how the RSXs are doing compared to the TSXs, or how the Acuras are doing compared to the Lexuses (Lexi?), etc.
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