#   Super Premium Synthetic Blend 4 Stroke Marine Oil 25w40 – 3.7L   956616

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    $81.82  each

            Brand: [RHS Boating & Marine – Boat Parts, Marine Accessories & Boating Supplies](https://www.rhsboating.com.au/brands-listing/category/rhs-boating-marine-boat-parts-marine-accessories-boating-supplies.html)

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    ### Super Premium Synthetic Blend 4 Stroke Oil 25w40 - 3.7L

Choose Super Premium Synthetic Blend 4 Stroke Oil 25w40 - 3.7L for a marine engine that calls for this lubricant specification. The 3.7 L version provides a defined quantity of 25W40 synthetic-blend oil for a planned service or suitable top-up, with application details that should be checked against the engine before use.

The 25W40 grade is part of the product’s identity and should match the viscosity required by the engine. Pro Star combines synthetic base stocks with polymer additives intended to maintain viscosity under demanding marine operating conditions. The blend also provides low-temperature properties to support starting.

The additive package helps maintain engine cleanliness and prevent sludge build-up. It is formulated for the higher-rpm, higher-stress conditions associated with marine engine use, with the stated API performance requirements providing additional information for lubricant selection.

Check both viscosity and performance requirements in the engine manual before filling. A familiar brand or a container labelled four-stroke is not enough to establish suitability for every engine. The oil-change quantity, filter requirements and service interval should also come from the engine’s instructions.

The 3.7 L pack puts more of the specified oil on hand for servicing. Compare the container quantity with the complete job, including any filter change, so you can arrange the amount needed before starting.

### Choosing and using this product

Record the exact product reference with the maintenance details so the same specification can be checked at the next service. Where this listing is an applicator or maintenance accessory, confirm the compatible product and supplied contents separately.

Compare the supplied quantity with the service you are planning. A small tube, bottle and bulk container serve different purchasing needs. Check the equipment instructions for the actual fill or treatment quantity rather than deriving it from the pack size.

### Product details

- Product code: 956616
- Pack size: 3.7 L
- Grade: 25W40
- Synthetic-blend engine oil
- For appropriate four-stroke high-performance outboards, petrol inboards and sterndrives
- Performance specifications: API SJ, CF-4 and CH-4
- Shear-stable polymer additives
- Additives for engine cleanliness and sludge control