FlatSix911
Porsche 918 Hybrid
There are a couple of passionate threads on the secret counter which I think was Model S performance models. Tesla secretly decreased power once you had so many Supercharger or fast charging sessions. Folks complained and Tesla reversed them I think but best to check out those threads. May not be applicable for M3.
The Supercharger counter is still in effect for both Model S and X... no data yet for the Model 3