Marine engine oils and additives are essential for ensuring optimal performance, long life, and corrosion protection, especially in salty environments. Products must be specifically designed for marine use, formulated for outboard, sterndrive, or inboard engines, whether diesel or gasoline.

🛢️ Main categories of marine oils

1. 2-stroke oil (TC-W3) 2-stroke outboard engines -> High lubrication, low smoke, NMMA TC-W3 specification
2. 4-stroke oil (SAE 10W-30 or 25W-40) Outboard and sterndrive 4T -> Corrosion protection, stable viscosity, often API SJ or higher
3. Diesel engine oil (SAE 15W-40 or 10W-40) Inboard diesel -> Additive against deposits, high thermal resistance
4. Transmission oil / stern drive Stern drive or gearbox -> Anti-foam, wear protection, specific for marine gears
5. Hydraulic oil (ISO VG 32 / 46) Steering systems, trim tabs, winches -> Stable viscosity, anti-emulsion, anti-rust

🔧 Useful nautical additives

1. Fuel stabilizer Prevents gasoline from oxidizing during storage
2. Diesel Anti-Condensation Treatment Protects against algae and water in the tank
3. Injector or carburetor cleaner Improves combustion and reduces fuel consumption
4. Anti-corrosion oil additive Increases engine protection, useful in marine conditions
5. Engine Flush Cleaner Cleans internal circuits before oil changes