Walmart: STP Gas Treatment $0.52 Money-Maker!

Here is a great deal at Walmart for STP Gas Treatment! If you can spot a bottle that has a Buy One Get One Free Rebate tag on it, you can make a sweet $0.52 money-maker! Here’s the deal:
Buy 2 STP Gas Treatment,  $1.68 ea.
Use (2) $1/1 STP Gas Treatment
Get one free with rebate ($1.68 back)
Total: Free + $0.32 money-maker!