5% back on gas from American Express, on top of your regular credit card rewards

The American Express card is running a 5% gas promo at Phillips 66, Conoco, 76, Exxon or Mobil stations. The 5% back is on top of your regular card rewards. 

• Earn 5% back on every dollar you spend when you use your registered American Express Card to fill up at any Exxon or Mobil station from 12/20/10-1/20/11.  Register here first.
• Earn 5% back on every dollar you spend when you use your registered American Express Card to fill up at any Phillips 66, Conoco, or 76 station, until 3/26/11. Register here first.

Hat tip to one of my favorites, MyMoneyBlog.