I'm thinking ahead to my Model 3 and pondering how I would replicate an essential ritual which has always been a part of car ownership in my family. Regardless of who fills up the car, my family has always kept impeccable records of our gas usage every time: Litres added Cost per litre Fill-up cost Trip distance (after filling, this is reset) Lifetime mileage Date Yes, you can work out some of those numbers from others, and that's a good thing. When I compiled all twelve years' worth of this handwritten data into a spreadsheet to compare the Accord with a hypothetical Model S over the same time period, some numbers weren't quite readable. So redundancy is a good thing. Due to near-daily charging, it would be much more burdensome to maintain this type of record for an EV. And whatever outlet you plug into would need an energy use meter to count the kW since Teslas only report energy consumed from the battery, not the total energy use from the charge port. Obviously, given an unlimited amount of time to scribble numbers in a notebook, it would be nice to have the following: kWh added Cost per kWh (live for TOU rates) Fill-up cost Trip distance (as above, diligent resetting required) Lifetime mileage Date Car's reported energy use (great for efficiency calculations) Am I missing anything? Do you collect stats like this? If so, what? Supercharging would really mess with the efficiency calculations since you can't measure the energy being added.