That email has been circulating online for years. They just keep changing the price of gas to correspond with whatever the going rate is at the time.
Best thing to do with that type of email is check it out on www.snopes.com to verify the validity. If it is a spoof, just delete it. Don't pass it along to others. All of us get enough junk in our email boxes daily, not to have to worry about more trash piling up.
Our lives begin to end the day we become silent about the things that matter.