Suzuki Marine 10W-40 – Semi-Synthetic 4-Stroke Outboard Engine Oil

Suzuki Marine 10W-40 semi-synthetic 4-stroke oil is engineered to meet the rigorous demands of modern outboard engines, particularly those made by Suzuki. Its advanced formulation blends high-quality mineral and synthetic base stocks with special additives that protect your engine under harsh marine conditions. The oil maintains a stable lubricating film across a broad temperature range – ensuring easy cold starts on cool mornings and reliable lubrication during extended high-RPM runs on hot summer days.

As an official Suzuki-branded oil, this product helps maintain your engine’s warranty compliance and peak performance. Anti-wear and anti-corrosion additives guard critical components – bearings, camshafts, cylinders – against premature wear and rust, which is especially important when running in saltwater or brackish environments. The oil also minimizes foaming and carbon deposit formation, resulting in a cleaner combustion chamber and spark plugs, and reducing the risk of power loss over time.

Applications & Recommendations:

• For all Suzuki 4-stroke outboard engines: This oil is factory-recommended for Suzuki models ranging from portable 2.5 HP kickers to large V6 outboards. It is formulated to meet the needs of marine engines operating at high RPM and variable loads, giving Suzuki owners peace of mind for new and older engines alike.
• Compatible with other brands: It can also be used in outboard motors from Honda, Yamaha, Mercury, Tohatsu, etc., that require a 10W-40 viscosity and API SL (or earlier) rating or carry NMMA FC-W approval. The semi-synthetic blend supports longer intervals between oil changes without compromising protection.
• 1 L bottle – convenient size for a single oil change on small to mid-sized engines (e.g. up to 60–90 HP) or for topping off oil during the season. The 1L bottle is easy to stow on board as a spare.
• 5 L jerrycan – cost-effective option for owners of larger engines (e.g. 100–300 HP) or fleets with multiple boats. The 5-liter container provides enough volume for a complete oil change on one high-displacement outboard or multiple changes on smaller engines, reducing cost per liter.
• Oil change interval: It’s recommended to change the oil every 100 engine hours or once per year (whichever comes first), or as directed by your engine’s manual. Always warm the engine to operating temperature before draining to ensure a thorough flush. Use a genuine oil filter and refill with the manufacturer’s specified oil volume for your model.
• Additional benefit: This oil meets the NMMA FC-W standard, which means it’s tested for marine use – i.e. it resists fuel dilution and water intrusion. This helps maintain strong protection even during extended idling or frequent trolling at low speeds, ensuring your engine stays healthy under all operating conditions.