At first, there was no traffic and my mileage jumped up. The minivan at work jumped from 13 MPG average to 22 MPG average. At first my mileage in the SportWagen jumped up too, but now it is crashing hard. I'm an essential worker, and my vehicle is my office. The past several weeks it has been over 90F with high humidity. This past week it has been close to 100 with high humidity. Now, I'm letting the car idle with the a/c on while I do my paperwork at each stop, and what I think is the biggest killer, lunch. I can't go into a restaurant for lunch as the dining rooms are closed, so I go through the drive thru, get my lunch, then park in the parking lot with the a/c running for 30 minutes while I eat my lunch. I'm down to the low 30's for a tank in the SportWagen TDI. Even with the extended idling my cost per mile is still a very agreeable $0.072/mile because of the low fuel prices. What's everyone else's observations?