Royal Purple Extended Life Engine Oil Filter 20-561: OE replacement engine oil filter 20,000 mile protection 99% filtration Anti-drain back valve to prevent dry starts Equivalent of: Fram Ultra XG2870A Mobil 1 M1-205A K&N HP-2005 Motocraft FL401 AC Delco PF60 Vehicle Application: 1977 - 1979 American Motors 1969 - 2015 Audi & Volkswagen 1972 - 1975 Chevrolet Luv Truck 1985 - 1993 Mercedes 1963 - 1983 Nissan 1970 - 1983 Subaru 1966 - 1985 Toyota 1974 - 2015 Volkswagen 1977 - 1979 Volvo Not all engine oil filters have an anti-drain back valve, but all Royal Purple Extended Life Automotive Spin-On Oil Filters do. The purpose of an anti-drain back valve is to avoid dry starts that can really grind on your engine. Anti-drain back valves prevent oil drain back when you shut off the vehicle, leaving just enough behind for startup. Our valve is built to last, constructed from durable silicone that outlasts standard rubber in both extreme hot and cold temperatures. The shell of our filter is heavier for extra strength and security from road debris puncture. Heavy-duty nitrile rubber base gasket and metal end caps provide a positive seal and prevent leaks. When to Change Your Oil Filter: Changing your oil yourself shouldn't take very long and can save you some money. The question we get most often is: when do oil filters need to be changed? If your car is still under warranty, follow the manufacturer's recommended change interval. If not, the filter and the oil go hand in hand. When the oil goes, the filter goes. Dirty or clogged oil filters can allow contaminants to pass through or block the flow of oil to your engine. It's not recommended to change our oil filter without changing the oil. You can install your oil filter using the instructions on the filter, using a filter wrench as needed. Royal Purple is compatible with all synthetic and conventional oils. About Royal Purple Filters: Royal Purple Engine Oil Filters are premium filters compatible with all synthetic and conventional oils. At Royal Purple, we focus exclusively on developing state-of-the-art lubricants to out-perform other oil brands. That includes best-in-class fuel system cleaners, synthetic gear oil, oil filters, and more to help you get peak performance out of your engine. Make your car, boat, motorcycle, snowmobile, or other motorized gear more reliable, and protect their longevity with the best lubricants, engine fluids, and oil filters.