Active cleansing agents. Helps prevent sludge build up. From the maker of America's most trusted motor oil (Based on a leading independent research study from January 2005 - June 2014), and advanced proprietary formula that lubricates, cleans and protects engines. Pennzoil Motor Oil with Active Cleansing Agents: Helps prevent sludge and other damaging deposits; Provides proven wear protection. Compatible with engine seals and all conventional oils. No leading conventional oil provides better wear protection. Based on Sequence IVA wear test using SAE 5W-30). Suitable for all car, SUV, light van and truck gasoline engines; under all driving conditions, where an SAE 20W-50, API SN (or earlier category) motor oil is recommended. For vehicles calling for API SN and all previous categories. Meets or exceeds the requirements of the following industry specifications: Exceeds API SN and all previous categories. SAE 20W-50: API Service SN. www.pennzoil.com. Made in USA of domestic and imported components.