This is a vintage STP Oil Treatment porcelain sign (also known as a STP automobile gas service station pump plate), measuring 12 inches round. It features the classic engine protection theme: ” STP ” in bold white on red/black diamond logo at the top, detailed illustration of a V8 engine with chrome valve covers and oil pan, ” OIL TREATMENT ” in large white letters below, MADE IN U. ” on red/white stripes, ” For extra engine protection curved slogan at the bottom in yellow – a classic STP motor oil additive advertising sign. Made of porcelain enamel on steel with patina and wear: rust spotting around the mounting holes, minor edge chips, light surface scratches, and minimal discoloration. This is a porcelain enamel advertising sign in excellent condition, exactly as shown in the photos. This vintage STP engine treatment sign makes a great addition to a garage, shop display, man cave, or any STP memorabilia collection, vintage motor oil advertising collection, or classic car enthusiast collection. Vibrant colors and excellent porcelain.