Walmart & Family Dollar: FREE STP Products

There is a $2 off STP Product coupon here. Here's how to use it to get yourself some FREE product:

Walmart:

STP Fuel Injector & STP Carburetor Treatment are reported to be $1.87...so FREE after coupon.

Family Dollar:

STP Son of a Gun! Tire Care 20 0z. and the STP Son of a Gun! Protectant 10 oz. on sale for $2...so FREE after coupon