Fleetguard LF3681 Full-Flow Spin-On Engine Oil Filter

Full-flow spin-on engine oil filter that traps wear-causing contaminants before they reach bearings and cylinder walls. It is the Fleetguard equivalent for Ford F1AZ6731A and Motorcraft FL820 applications, making it a common service filter for Ford gas-engine motorhome chassis and light trucks. A built-in bypass valve keeps oil flowing during cold starts or if the element loads up.