I decided to discover just how bad the trip meter is. It seems to be basically garbage. Even the "since last charge" is lying, even by the car's own measure, even taking out vampire losses, which should be included in there regardless. It is "since last charge" after all. So if you do short trips, and you preheat the car, it seems NONE of that usage is included. By how much? Let's say 4 short trips over 8.1 miles, and 14 hours total time. The first trip of which is after charging/preheating on shore power. Reported usage is 6.1 kWh and 672 Wh/mi. Actual usage went from 189.7 to 162.7 RM, as reported by VisibleTesla. What does that come out to? ~8.4kWh. Actual energy usage over 1000Wh/mi. My napkin calculations got 1077 with vampire, 1002 without. This is not included charging efficiencies, this is only what the car is reporting. If I take out the charging efficiency I've measured previously, actual achieved is a whopping 1158 Wh/mi! That's A LOT of error. If I wasn't doing the math, I could be convinced that this was saving money. But since I can do math, I can see this is about 30% more expensive that the same drive done in an ICE that's getting 14mpg of premium fuel at current prices.