STP Oil Treatment 15 oz. - 12 Pack

Oil Treatment Scientifically Engineered for Conventional or Synthetic Oils High Quality Base Stock Carrier of active ingredients to help protect internal engine parts Viscosity Index Improver VII Cushions engine parts to help reduce metal-to-metal contact Helps reduce oil consumption Zinc Dialkyl Dithiophosphate ZDDP Anti-wear agent that helps provide a layer of protection for engine partsSTP Oil Treatment, 15oz:For all cars, light trucks and SUVsHigh-viscosity formulaDesigned to help fight metal-to-metal frictionProvides a thicker cushion between moving engine partsIngredients:Ingredients: Contains Zinc Dialkyl Dithiophosphate.Instructions: . Directions: Add 1 bottle to 4-5 quarts of oil at or between oil changes.