Agreed. I do most of my commuting by bus, and mostly drive my car nights and weekends, when the bus doesn't run as often, or my few trips out of town - most months I only fill up once. That said, I wouldn't get rid of my car: I live in one of about 15 cities in Canada large enough to have a decent bus system [1, >300,000 people], and when I make the 15 hour drive a quarter of the way across the country to visit my family, I need the car to get around, because they live 10 kilometres from the nearest town large enough to have a supermarket. Public transit is awesome, but most of my country simply doesn't have the population density to support it (the distances and travel times are similar in the US, though there are more cities, so I understand the car culture)
[1] http://www.statcan.gc.ca/tables-tableaux/sum-som/l01/cst01/d...