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Whether you’re cruising offshore or working your vessel daily, your marine diesel engine depends on clean, well-filtered oil to operate efficiently. Regular oil filter maintenance is one of the simplest—and most important—tasks you can perform to protect your engine, reduce downtime, and extend its service life. In this post, we’ll explain why timely oil filter replacement matters, highlight the best OEM filter options like Fleetguard’s LF3959, LF14000NN, and LF9009 …