STP is an American company that specializes in automotive maintenance, additives, and lubricants. Since 1953, STP has been the leading brand name for manufacturing automotive performance products. Regular use of STP products should help your engine run smoother for longer. STP automotive maintenance products include fuel additives, motor oil, oil additives, multipurpose motor treatment, functional fluids, appearance products, and licensed products. Visit the STP website to get simple tips on how to maintain your car properly. You don't have to be an expert on cars to learn basic tips and tricks to make sure your car lasts as long as it can. STP makes it simple for you to make sure your car and engine are well taken care of, that you have what you need for your transmission, power steering, brake fluid, cooling system, and everything in between.