We've joined the $4.00 club

My husband recently read an article in a financial magazine about the $4.00 club. I'm sure you all remember when gas prices hit $4.00 or more/gallon. Well ,we all made it through those days, driving less maybe but we made it. Now that gas has dropped back to the $2.00/gallon range....we've joined the $4.00 club. All that means is when we gas up, we calculate what we would have spent at the pump if gas was still $4.00/gallon and we put the difference into savings.