[gambiting]

>>And if you need that, my -98 Volvo got a little pin on the dash you can press to zero a sub-odometer. It also reset the fuel consumption average. So, ye, no need for spyware.

Not sure how this would work in a PHEV where the car is seamlessly switching between EV and ICE running, or in fact compliments ICE with the EV motor. You need the internal reads from the ECU to know exactly how much electricity/petrol was consumed.

You could - of course - provide that without syncing it externally to any servers and then avoid the whole privacy issue.