Go to Facebook and “like” the STP page for a printable coupon. Use this coupon at Target to grab two 2-packs of STP gas treatment for your car for only $2.24 each. That’s just $1.12 per bottle!

Use one $2.00/2STP Products (facebook.com)

Final Price: $2.24 each, when you buy 2, or $1.12 each