Sierra Marine Heavy Duty 15W-40 4-Stroke Engine Oil, 1 Quart is in stock and available for pickup within 24hrs.
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✔ Locally owned in Nanaimo, BC
✔ Trusted by boaters and anglers since 1986
✔ Knowledgeable staff with real on-the-water experience
✔ Large in-stock selection of marine & fishing gear
We’re here to help you get the right gear the first time.
We ship across Canada with fast, reliable delivery from our Nanaimo location.
✔ Trusted since 1986
✔ Fast Canada-wide shipping
✔ Expert support available
Need it sooner or have questions? Our team is here to help.
We stand behind the products we sell and want you to shop with confidence.
✔ Easy returns on eligible items
✔ Manufacturer warranties supported
✔ In-store support available if you need help
Some items are non-returnable. Please review our full Return & Refund Policy before completing your purchase.
Sierra Marine Heavy Duty 15W-40 4-Stroke Engine Oil, 1 Quart is formulated for demanding marine engine service where dependable lubrication and engine protection matter most. Designed for the heavy-duty inboard marine market, this conventional marine engine oil uses premium base stocks and an advanced additive package to help protect internal components, support cleaner operation, and maintain reliable performance in hard-working 4-stroke engines.
Sierra Marine oil is a solid choice for boat owners and service professionals who want reliable protection for inboard 4-stroke engines. Its formulation is intended to help fight breakdown under stress while supporting clean-running performance in marine environments. Whether you are performing routine maintenance or stocking up for seasonal service, Sierra Marine provides the quality and consistency expected from a trusted marine brand.
Packaged in a convenient 1-quart bottle, this 15W-40 engine oil is fully universal for compatible 4-stroke marine applications calling for this viscosity and specification level. Always confirm your engine manufacturer's recommended oil grade and service requirements before use.
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Sierra Marine Heavy Duty 15W-40 4-Stroke Engine Oil, 1 Quart is formulated for demanding marine engine service where dependable lubrication and engine protection matter most. Designed for the heavy-duty inboard marine market, this conventional marine engine oil uses premium base stocks and an advanced additive package to help protect internal components, support cleaner operation, and maintain reliable performance in hard-working 4-stroke engines.
Sierra Marine oil is a solid choice for boat owners and service professionals who want reliable protection for inboard 4-stroke engines. Its formulation is intended to help fight breakdown under stress while supporting clean-running performance in marine environments. Whether you are performing routine maintenance or stocking up for seasonal service, Sierra Marine provides the quality and consistency expected from a trusted marine brand.
Packaged in a convenient 1-quart bottle, this 15W-40 engine oil is fully universal for compatible 4-stroke marine applications calling for this viscosity and specification level. Always confirm your engine manufacturer's recommended oil grade and service requirements before use.
