First two fill-ups

54 electric miles, but only charged once

The car has been exceeding my expectations for fuel economy. I filled up the tank after 800 miles - almost a month of real-world usage that  was mostly around town, but included a trip to San Francisco (about 80 miles), a trip to Suisun (120 miles) and a trip to Pescadero (about 90 miles). It's a little surprising that the car can report more than 30 all-electric miles on a long trip, evidently due to regenerative braking. The trip to Pescadero involved going over a mountain range, which was fun because all that altitude can drive the car pretty far when you're descending.

Overall, the first tank yielded 67 MPG, which I think is exceptional. For a minivan this large, I'd expect around 22 MPG in the real world, which means that we've successfully reduced our fossil-fuel consumption by about 3X. For everyday use the reduction is even more than that, but we do take some longer trips occasionally, and for that we're glad to have the gasoline engine onboard.

After filling up the car, we went to the mountains again, this time to camp near Santa Cruz. It was a 96 mile trip through the mountains, with the car packed to the brim with stuff and people. After getting back, I filled up the car again - only 2.1 gallons for the trip, so about 45 MPG. Would have been better if I had charged overnight, but we were camping without electricity. The car made it 33 miles to Felton without using the engine, even though that involved going up and down some mountains. If you subtract the 33 miles from the initial charged battery, we had 63 miles for 2.1 gallons, which is 30 MPG for the portion of the trip after the battery ran out. This is quite a bit better than I was expecting, given that the car was loaded, the air conditioner was running, and we were driving through the mountains.

Overall, the car is outperforming my exceptions when it comes to energy efficiency. And when you consider energy efficiency per passenger, it's likely one of the best cars on the road. It's a great combination of utility and efficiency.