{"product_id":"sierra-marine-heavy-duty-15w-40-4-stroke-engine-oil-1-quart","title":"Sierra Marine Heavy Duty 15W-40 4-Stroke Engine Oil, 1 Quart","description":"\u003cp\u003e\u003cstrong\u003eSierra Marine Heavy Duty 15W-40 4-Stroke Engine Oil, 1 Quart\u003c\/strong\u003e 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.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSAE 15W-40 viscosity:\u003c\/strong\u003e Delivers the multi-viscosity protection needed for marine engines operating under heavy load and varying temperatures.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCK-4\/SM performance level:\u003c\/strong\u003e Meets recognized service classifications for dependable wear control, deposit resistance, and engine cleanliness.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNMMA FC-W certified:\u003c\/strong\u003e Suitable for marine applications that require FC-W performance standards.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eSierra 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.\u003c\/p\u003e\u003cp\u003ePackaged 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.\u003c\/p\u003e","brand":"SIERRA","offers":[{"title":"Default Title","offer_id":47513874661554,"sku":"SIE-18-9554-2","price":16.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0662\/3028\/8562\/files\/2015701-sierra-marine-1895542-oil-0.jpg?v=1779722856","url":"https:\/\/www.harbourchandler.ca\/products\/sierra-marine-heavy-duty-15w-40-4-stroke-engine-oil-1-quart","provider":"The Harbour Chandler","version":"1.0","type":"link"}