cold calculations: is this an MPG record?

It was about 6-degrees F outside when I pulled out of the garage to give Mrs. Bear a short drive to the local commuter rail station this morning. It's only about a quarter mile away and it was nice to have the Prime all warm inside from a few minutes of "pre-conditioning" while plugged-in.

Figuring it would be back on the charger before any serious depletion of the battery, I let the climate control run with the cabin temperature set to a comfortable 70-degrees F.

Unfortunately, the train was a little late so we had to wait in the parking area inside of the nice warm car. Of course, once the Prime figured out how cold it was, the gasoline engine started up to take over from the heat-pump and provide heat.

Not a problem. We were only waiting for a few minutes before the train arrived. And, interestingly, when the ICE started up, the dashboard display still showed the Prime to be in EV -- not HV -- mode.

Then, just about a quarter mile drive back home to plug-in to the EVSE in my garage and to grab a cup of coffee and glance at the morning paper before settling into my home office.

Of course, I checked the "Charge Management" on my phone to reassure myself that the Prime was properly plugged-in and charging, and to see the estimate of how long it would take to fully recharge.

Maybe I should have stopped there, but I decided to look at the ECO Dashboard and see my daily mileage statistics. And then, when I looked at today's stats which reflected only the 4/10-mile round trip to the train station, I saw what may be a Prius Prime mileage record: 14.2 mpg.

Now that rivals the mileage I used to get on a Cadillac STS with a 4.6-liter V-8 engine. Of course, it was undoubtedly an artifact of the very short trip and the use of the gas engine while waiting for the train. But, I have to wonder, what will my friends think when I tell them that my plug-in hybrid can get 14.2 mpg?