Description Fleetguard LF691A full-flow spin-on engine lube oil filter for heavy-duty diesel applications, providing OEM-equivalent replacement for Caterpillar 1R0716, 1R1808, 4W6000, 2Y8097 and Donaldson P551808 filters on Caterpillar C12, C15, 3406 and other engines using these cross-reference numbers.