I just finished my first year of Volt ownership.
109 gallons of gasoline
The car I traded in, an Acura MDX, would have used about 720 gallons to go the same number of miles.
My daily electric cost, from nuclear, was about 60 cents a day.
That works out to a savings of about $1900 at gas prices here and it is a joy to drive, very quiet and smooth as glass on battery power.