Castrol Outboard 4T 15W-40 1L - Premium Protection for Your Outboard Engine

Purpose and Specifications

Castrol Outboard 4T 15W-40 is a high-performance, part-synthetic engine oil designed exclusively for 4-stroke outboard engines from major Japanese and American manufacturers. This premium 1-liter bottle delivers exceptional protection across demanding conditions, from high-speed cruising to long idling periods.

• Flows smoothly at low temperatures down to -42°C for reliable cold starts and valve train protection during chilly mornings or winter storage.
• Maintains thick oil film at high operating temperatures up to 220°C flash point, resisting breakdown even with fuel dilution for lasting engine defense.
• Keeps pistons clean and reduces oil consumption, minimizing spark plug fouling and ensuring smooth performance.
• Anti-corrosion shield protects internals during off-season storage, preventing rust in saltwater environments.

Meets API SL/CF standards for modern outboards, providing superior wear control and engine longevity.

When to Use / Replace?

Use Castrol Outboard 4T in all 4-stroke outboard motors for everyday boating, fishing trips, or offshore adventures. Replace every 100 hours of operation or annually (whichever comes first), or after 1500 km of equivalent use. Shelf life is 5 years when stored below 60°C away from direct sun.

FAQ

Q: Is this oil suitable for my Yamaha or Mercury outboard?
A: Yes, it's engineered for all major 4-stroke outboards from Japanese and American brands, delivering top protection in harsh marine conditions.

Q: How does 15W-40 benefit my engine in varying temps?
A: The 15W flows easily in cold water down to -42°C for quick protection, while 40 stays thick in hot running conditions for reduced wear.

Q: What's the storage tip for best results?
A: Keep sealed below 60°C, ideally indoors; it lasts up to 5 years and guards against corrosion during winter layup.