edaniel's analysis is roughly correct, but a little optimistic IMHO.

The EPA rating for the Volt is 35 kWh per 100 miles, so 2.86 miles/kWh plugs-to-wheel . If you eek out 41 miles instead of the rated 38 that is a slightly better 3.09 miles/kWh (again, plug-to-wheel, so including the charge losses).

At the stated electrical costs of 10.5 c/kWh that means **$0.034 per mile** energy cost to drive the Volt electric. ($408/yea

At 36.12 MPG at $2.79/gallon the Volt costs **$0.077 per mile to drive on premium gasoline**.

The Lexus RX 350 is 21 MPG at $2.24, which is **$0.107 per mile**. But that is a hulking SUV so not a fair comparison.

At 48 MPG a Prius would be **$0.047 per mile**

I live in a mild California climate, where I get ~42 miles per charge in my 2013 Volt during summer days (EPA is 38). But on cold rainy winter days (like today) I get just 30. Since OH is a lot colder I suspect that the the true annual average of 41 MPG is too optimistic. In California my electric costs are way higher (17c/kWh effective), making electric driving less cost effective.

The cost argument to drive electric remains weak. At an average of 12K/year, the difference between driving the Volt electric vs on gasoline is only $500/year. That small compared to the depreciation and insurance costs. The difference with a comparably sized hybrid car is just $156. Given the higher depreciation of the Volt driving electric is a net negative.

Higher gasoline prices could change the equation. Still the most effective way to reduce costs it to drive a high MPG car. Its easy to cut cost in half by swapping a 20MPG SUV for 40MPG hybrid.

Just a little clarification. My goal was not to compare to other efficient vehicles or tout the efficiency of the Volt or any other electric. It is what it is. In my summary and the numbers, the all electric mode is where the savings could be, but would require more range. One can get this with a Bolt, Leaf or others, but cannot drive from the East coast to the West coast without recharging and is not usable for an all round car. So with my Volt, one is left with $400-500 savings/year vs a more comfortable and capable 21mpg car, based on my usage and driving habits. Not too compelling for general all around use including travel.

In freezing temperatures, such as this AM, I had 33 on my estimator and found this has been roughly accurate (31-34) in winter (Dec-Feb, average high temps, low 40's, average low temps, low-mid 20's). In Spring through Fall the mileage usually shows around 44, once in a while 45, so I stand by my

__weighted__ average of 41 miles per charge. Otherwise your math is roughly correct. So the Volt works out to 50 mpg cost equivalent based on my historical usage or 78.78 mpg all electric cost equivalent at current gas prices. Using weighted average of 38.75 based on reducing summer to 41 works out to $450 annual savings and 74.45 all electric mpg equivalent at current gas prices.

Regarding the Lexus RX350, I have a choice, drive the Lexus or my Volt when around town when my wife and I are together, hence the comparison I would never trade the Lexus which we bought for travel and my wife uses around town, for a compact Prius or the like for 8-12 hour drives while traveling for 1 - 2 days at a time, loaded with bikes and gear which would never fit in or on a compact fuel efficient car. My previous car was a BMW Z3 also a 20 mpg car, again for use mostly around town, again a higher depreciation rate. My net cost on the Volt was about $21,000 while the Lexus was in the low 50's. A used Prius, 1.5 - 2.5 years old would be in the upper teens in my area, according to asking prices on TrueCar. Currently a similar Volt is a thousand or two less than the Prius, so depreciation for "used" is a moot point.

For

__my use__, I like my Volt. It rides well since the Volt has a longer wheel base and is wider, is well appointed (Premium Edition) and has plenty of power in flat and mountainous terrain easily passing most 4 cylinder vehicles on the up-hill. I like that it is quiet and most times, I do not need to use a gas station, I simply plug it in every evening, and it charges itself as scheduled by 6:00 AM.