I can imagine that for many people this is unfortunately probably very true, but it would also be extremely dependent on the individual and their driving habits

I can imagine that for many people this is unfortunately probably very true, but it would also be extremely dependent on the individual and their driving habits. I drive my Chevy Volt 95% of the time on just the battery, which in my state is being charged with >80% Hydroelectric power. I just have to add about 8 gallons of gas to the car every ~3 months, usually after driving someone to the airport or something.