Sea-Doo Full Synthetic 5W-40 Engine Oil — 1 US Gallon (9779493), Powersports & Turbocharged Protection

SeaDoo XPS Full Synthetic 5W-40 engine oil (1 US gallon, part 9779493) is a purpose-built lubricant for high-performance 4-stroke powersports engines, engineered to protect turbocharged, supercharged and naturally aspirated units on water and land.

This full synthetic 5W-40 formula is formulated for demanding powersports applications — from personal watercraft to high-revving off-road and on-road machines. It balances shear stability, wear protection and corrosion resistance to keep modern 4-stroke engines and wet-transmission systems operating smoothly under heavy loads, variable temperatures and exposure to moisture. Packaged in a convenient one-gallon container, this SKU is ideal for frequent maintenance intervals or multi-machine servicing.

How does this oil perform in high-load or forced-induction engines?

The synthetic base and additive package are selected to withstand elevated cylinder pressures and temperatures found in turbocharged or supercharged powersports engines. It helps maintain film strength under stress so moving parts retain a protective oil layer during hard acceleration and extended high-rpm operation.

• Viscosity: 5W-40 for cold starts yet robust hot-film retention.
• Anti-wear additives to protect cams, bearings and piston rings.
• Shear-stable synthetic base oils for consistent protection over time.

Will it protect engines and transmissions exposed to water and salt?

This XPS formulation includes corrosion inhibitors tailored to powersports environments where moisture and salt exposure are common. Those additives help limit rust and corrosion on metal components inside engines and wet-sump transmissions, extending component life when used as part of regular maintenance.

• Corrosion-resisting additives help shield internal surfaces from moisture.
• Designed for wet-clutch and integrated transmission systems when specified.
• Suitable for both freshwater and brackish/salt-prone operating conditions with routine oil changes.

How often should I change the oil and what quantity is this container?

The one-gallon container (3.785 L) provides enough volume for multiple oil changes on many personal watercraft and powersports machines, depending on manufacturer fill capacity. Follow your vehicle maker's service intervals and check levels after running; those intervals vary by model, usage intensity and environment.

• Container size: 1 US gallon (3.785 liters) for multiple services.
• Refer to your owner's manual for factory-recommended oil change intervals.
• Inspect oil condition and level after heavy use or saltwater exposure.

Is this oil compatible with other XPS formats and how to choose the right one?

SeaDoo XPS oils share a family of formulations but come in different viscosities and container sizes to match application requirements. Choose the 5W-40 full synthetic for modern 4-stroke powersports engines that specify that viscosity; smaller bottles (such as the 1 quart SKU) are available if you only need a top-up or single-service volume.

• Same XPS family; pick viscosity based on OEM recommendation.
• 1 US gallon is best for multi-service needs; 1 quart available for single fills.
• Mixing with other brands reduces warranty clarity—follow manufacturer guidance.

Who is this for: This SeaDoo XPS Full Synthetic 5W-40 oil (part 9779493) is aimed at powersports owners, technicians and fleet operators who run personal watercraft, off-road or on-road four-stroke engines that demand a high-performance synthetic lubricant. It suits riders who encounter heavy loads, forced induction or corrosive environments and need a reliable one-gallon supply for frequent maintenance or servicing multiple machines. Always confirm compatibility with your engine maker’s specifications before use.