The best thing about this car is that the numbers can vary alot whether you drive it like a 350z (as Eric's numbers above) or like a Cmax was intended to be which would be alot higher.
First off, 31 miles is very possible to reach your destination on battery only if you are #1 stuck in traffic alot, and #2 keep the average speed to 40mph or below.
2nd if you don't make it on EV and use the ICE, if you keep the speeds down below 55mph your MPG numbers should be close to 51mpg not 39 due to the hybrid action.
Assuming you drive hybrid only, at 51mpg you should get about 715 miles range. 31 miles each trip back and forth is 62 miles per day. Should last you 11 trips or over 2 weeks before you have to get gas.
Now add the battery into the mix. If you use the battery where it needs to be used and use the engine where it should be used, your average MPG number should go up to around 72mpg (that's my average lifetime with the 2017 now). Now your range is 1008 miles and your fuel tank should last you over 3 weeks, 16 days/trips before you have to get gas.
And lastly it can vary from 16 days to unlimited days until you wear the battery out if you drive 100% EV and charge it at work to go back.
How long are you keeping the car? Is it a lease or is it yours? This my new recommendation now:
#1 if its a lease you don't care about the battery, so charge it both at home and at work and use it 100% dry every day and use as little gas as possible.
#2 if its yours to keep, use the battery only 1 bar continuous on average, start the engine for heavier loads, climbing hills or highway speeds and use the battery slowly giving you a range of at least 37 miles or 60km on battery. If some is left in it when you get to work then so be it, and if you do the same going home determine how much you need to charge it at work so you can get back using some engine and don't charge it in the heat or while baking in the sun.
The original consensus of this car was to try to drive it like there was no engine. Use the battery all the time, charge it and use the battery more, and run errands all day on battery. Install a 240v charger in your garage so you can do this, and keep the engine at home when you go out (if you could).
Now I say don't do that, especially if you want the battery to last the life of the car, and don't charge it with 240 at home or don't buy that for your house, just use the 120v its plenty enough, 240 makes more heat while charging than 120v does - also encourages additional trips without letting the battery rest and cool down. I use 240v on the road but always 120v at home. and sparingly with the 240v I'm careful not to let it bake in the sun and charge, more so at night or evenings on 240v.
Welcome to the Cmax, and here, take a look at this, driving around the city with the engine and battery in places where it works best, when I fill the tank, see my range below!! Note that my battery is not full at that time, about 2/3rd with the 24 mile range, my average range in the summer is 35 miles fully charged. Here I'll post a picture of that also...
Last picture is showing that you can actually get 37 miles out of the battery if you drive it very efficiently, and showing that you can indeed go back and forth to work on battery without using the engine, but in the summer not in the cold months of Canada. However, I would not recommend this if you plan to keep the car, I'd say always choose to keep the power draw low on the battery unless its a 100% short EV trip and you don't intend to start the engine. For a daily commute I would figure out where to start the engine to best fit into the mix of power needs.
Welcome aboard and hope this helps!!
Edited by rbort, 04 October 2017 - 08:11 AM.