Saw this on TrackHQ. It's an awesome deal!

Cliff Notes:
1. Register your vehicle on http://www.engineguarantee.com/
2. Get up to a $25 rebate
3. Go to your nearest Kragen and purchase 2 gallons of Valvoline motor oil for $14.99/gal.
4. Mail in the $25 rebate
5. Total comes out to less than $5.00

Here's the link for more information: http://slickdeals.net/forums/showthread.php?sduid=120538&t=2000292

Perfect timing because I was planning on changing my oil this weekend.