I don't know how to drive and we don't have a car right now :( But I found this website to gather information about gas prices in our area. The highest price I can find on this website for Brooklyn is $3.89 for regular and $4.05 for premium.
Being a New Yorker and a Brooklynite the easiest way for us to get around is on the subways and buses. It is very hard to find parking and expense too! The price for one fare on the subway is $2.00. I remember when I was a kid the fair was only .75 cents! But that is a whole other post....When I was working I would buy a weekly unlimited metrocard to save money.
Here are some pictures of us waiting for the subway: