Going Out = More Gas.

In order to go out to dinner, majority of people will drive their car to get there. One night may not seem like a big deal, but if it is a daily reoccurance, the amount of gas used adds up. The average family spent about $5,477 last year just in gas money and other auto expenses. Imagine how much that number could be reduced if families stayed in for almost every meal. Many families have more than one child, and often will drive to different restaurants to please everyone. This creates a spoiled child and is simply just a hassle. So to add more discipline and save on gas, make a home cooked meal that everyone agrees on and likes.

http://articles.moneycentral.msn.com/SavingandDebt/SaveonaCar/what-we-spend-on-cars.aspx