You’ve read all of your free items this month. To register, get added benefits and unlimited access to articles, Become a Member. Already a Member? Sign in. Advertising Age Article Abstract Frugal Urban Drivers Buy Into Flexcar Formula Young Adults Have Better Ways to Spend as They Heed Ad Message of 'Saving Green in More Ways Than One' By Tiffany Meyers, Published on June 08, 2007 0 Want more Access, Content & Connections? Upgrade to Membership. We are glad you are enjoying Advertising Age. To get uninterrupted access and additional benefits, become a member today. Become a Member Already a member? Log in.