With only 6 highway miles on your daily commute, you may find you never use gas - at least most of the year when it is warm outside. In the winter, the EV range will go down a bit - depending on how much you use the cabin heater. It can become a bit of a game: pre-heating the car before you leave in the morning while still plugged in to "shore power", and use of the seat heaters (don't buy a Volt without them) can mitigate the need to run the cabin heater. But of course the ICE is always there if/when needed, so no worries.