First year - detailed analysis

Happy birthday to my Prime! I received it on 4/14/17, first driving it on 4/15/17 (I got it late in the day). I kept detailed records of the information the car reported each day on the Drive Monitor. I live at 5,340 feet of altitude and do a mix of city and highway driving that's probably close to 50/50. I live in the Denver Colorado metro area so this included a full Colorado winter driving season, though we had a pretty mild winter this year.

Overall, this car is tremendously impressive!

The car's summary:



5 miles/kWh = 168.5MPGe.

I calculated (not measured) that I consumed 1,810kWh of electricity. I calculated that I used 78.2 gallons of gasoline. I actually bought 82.7 gallons of gasoline, but the tank is now more full than it was when I got the car.

Summary:
Days: 365
Driving days: 344
Ev-only days: 313
Hv days: 31
Days where I was not in my home town: 25
Out-of-town days that were all Ev: 1

Of the 7 remaining days where I used Hv but was in town:
Forgot to plug in or set the car to charge: 3 (all three were when the car was new and I was getting used to it).
Insufficient range: 4

Interestingly, I recorded how much I was short on the four days with insufficient range. They were 32, 32, 25 and 25 miles. The duplication is a coincidence since they were all different destinations. This means I would probably have been short all four days in a Volt as well!

Of the 24 out-of-town, mostly Hv days, there were 18 days when I was traveling between towns. On those 18 days, I traveled:

100-200 miles: 11 days
200-300 miles: 4 days
300-400 miles: 0 days
400-500 miles: 2 days
500-600 miles: 0 days
Over 600 miles: 1 day

Of the three trips I took, 2 could have been done in a 300 mile BEV, both with substantial (multi-hour) delays. 1 trip could not have been done at all. Of the 8 major travel legs I took on those trips, 1 could have been completed without significant delay, 1 with a minor delay, 4 with a major delay and 2 not at all.

Analysis of the daily data is below.

 

I drive the speed limit, usually with cruise control. I rarely do anything special to get better mileage.

That's total miles driven divided by gallons of gas used so, yes, it doesn't include the energy consumed by battery charging.