I noticed when planning trips to the beach that the LR Model 3 was only marginally cheaper than a gasoline car while S and X cars saved a bundle. I suspected a bias in the estimates. I discovered the web based trip planner will also estimate savings for your local commute. My commute is 38 miles each way so I ran this through the trip planner.

For any Model S or X my estimated monthly commuter savings is calculated as $214/month. Not a bad estimate, my calculations show me saving $180/month with my LEAF (using sightly different assumptions). Close enough to be happy the S and X estimates are pretty accurate. Certainly within the bounds of reasonableness.

For the LR Model 3 the estimate is for only $39/month savings over a 21 mpg gasoline car!! I call BS on this tool, the Model 3 should be at least as efficient as the S or X, and I'd expect it to be marginally better, not grossly worse. The tool correctly identifies that SC is not necessary for the daily commute, this eliminates the cost advantage of S and X models have with free SC vs paid SC. The differences if any should be based on estimated Wh per mile for each vehicle.

The tool is clearly anti-selling the model 3's cost savings by a huge margin to the point of being useless in calculating cost savings over a gasoline vehicle.