Fluids and filters for 1994–1998 5.9L Cummins Marine engines keep the engine clean and protected. Oil, coolant, and fuel maintain lubrication, cooling, and combustion. Filters remove contaminants from oil, fuel, and air. High-quality fluids and filters prevent wear and extend engine life. Use marine-grade products to resist corrosion and harsh conditions. Change fluids and filters regularly to ensure peak performance. Protect your engine—upgrade your fluids and filters today.