The ECOGARD S4011 Engine Oil Filter is a high-quality spin-on filter designed to provide reliable engine protection for a wide range of vehicles. Measuring 4.72 inches in height and 2.99 inches in outer diameter, this filter features an M18 x 1.5-OS inside thread size, ensuring a secure fit for compatible engines. It is equipped with both an anti-drain back valve and a bypass relief valve, which help maintain proper oil flow and prevent contaminants from re-entering the engine. The filter's construction includes a heavy-duty filter body capable of withstanding five times the normal oil pressure, enhancing durability and performance. Additionally, the molded silicone anti-drain back valve is designed to withstand extreme temperatures, contributing to the filter's longevity. This filter is compatible with various vehicles, including certain models from AM General, Buick, Cadillac, Chevrolet, GMC, and Oldsmobile, spanning production years from 1980 to 2001. By utilizing the ECOGARD S4011 Engine Oil Filter, fleet operators can ensure consistent engine performance and extend the service life of their vehicles, thereby reducing maintenance costs and downtime.