More than 200,000 happy U.S. motorists will be awarded free gasoline by Shell Oil as part of a promotional contest launched Monday. Shell will give away more than $2 million in free gas and instant-win prizes, including six grand prizes of - wait for it - a lifetime supply of free gasoline! Hundreds of thousands of other winners will walk away with $10 Shell Gas Cards.

The 'lifetime' prize isn't entirely open-ended - winners actually get 302 $300 Shell Gas Cards, based on 50 years of driving 13,500 miles/year and consuming 675 gallons a year.

"Scratch and Win" game cards are available at Shell outlets through October 1, and even if you don't win, it's not a total loss - each game card features a money-saving fuel tip to improve your fuel efficiency. Follow the "Read" link for full contest details.

[Source: Shell Oil]