{"title":"4 Stroke Boat Oil","description":"\u003cp\u003eSierra's 4 stroke boat oil is engineered to protect and extend the life of today’s inboard, outboard \u0026amp; sterndrive engines while meeting the demands of marine operating conditions. Our synthetic, premium, and direct injection oils are designed to meet or exceed OEM standards in a range of motors, including Mercury, Yamaha, Suzuki, Volvo, Nissan, and Yamaha. Shop Sierra's full line of \u003ca href=\"https:\/\/www.sierraparts.com\/collections\/marine-oils-lubes\"\u003e\u003cspan style=\"text-decoration: underline;\"\u003eboat engine oils\u003c\/span\u003e\u003c\/a\u003e, or use our \u003ca href=\"https:\/\/www.sierraparts.com\/pages\/parts-finder\"\u003e\u003cspan style=\"text-decoration: underline;\"\u003eparts-finder\u003c\/span\u003e\u003c\/a\u003e tool to search the extensive Sierra catalog. Backed by the best warranty in the marine industry, Sierra oil will keep you running safe and smooth all season.\u003c\/p\u003e","products":[{"product_id":"oil-change-kit-suzuki-df70a-df90a-2011-current-df115a-df140a-all-years","title":"Oil Change Kit: Suzuki DF70(A)-DF90(A) 2011-Current; DF115A-DF140A All Years","description":"\u003cp\u003e\u003cspan\u003eWorks with Suzuki DF70-140A HP; All Years\/All Models\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThis all-in-1 package includes recommended oil, oil filter, disposable funnel, maintenance sticker, and shop towels to perform recommended engine maintenance.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eKit includes:\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003e10W-40 FC-W Semi Synthetic Oil, Qt. - 18-9551-2\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eShop towel - N-189770\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDrain plug gasket - 18-0699\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eOil change funnel - 18-0003\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eOil Filter - 18-7905-2\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SIERRA","offers":[{"title":"Default Title","offer_id":50287059435839,"sku":"18-9231","price":102.89,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0759\/8273\/3631\/files\/18-9231.png?v=1757331463"},{"product_id":"18-9390","title":"Oil Change Kit: Yamaha F30-F70; T50-T60 All Years","description":"\u003cp\u003e\u003cspan\u003eFor use with Yamaha outboard models F30, F40, F50, F60, F70, T50, and T60 (all years).\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eKit includes:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cspan\u003e10W-30 FC-W 4-Stroke Oil, Qt - \u003c\/span\u003e18-9420-2\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eOil Pan Drain Gasket - 18-0755\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eOil Filter - 18-7911-1\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SIERRA","offers":[{"title":"Default Title","offer_id":50920032862527,"sku":"18-9390","price":48.29,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0759\/8273\/3631\/files\/18-9390.png?v=1757340981"},{"product_id":"18-9393","title":"Oil Change Kit: Yamaha F200-F250 3.3L All Years","description":"\u003cp\u003e\u003cspan\u003eFor use with Yamaha outboard models F200, F225, and F250 3.3L (all years).\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eKit includes:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e6 quarts of oil\u003c\/li\u003e\n\u003cli\u003eOil filter\u003c\/li\u003e\n\u003cli\u003eOil Gasket\u003c\/li\u003e\n\u003cli\u003eShop towel\u003cstrong\u003e\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"SIERRA","offers":[{"title":"Default Title","offer_id":50920033190207,"sku":"18-9393","price":93.19,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0759\/8273\/3631\/files\/18-9393.png?v=1757321548"},{"product_id":"25w-40-fc-w-4-stroke-catalyst-boat-engine-oil-18-9400cat-2","title":"25W-40 FC-W 4-Stroke Catalyst Oil, Qt. | 18-9400CAT-2","description":"\u003cp\u003e\u003cspan\u003eCapitalizing on \"ZDDP\" anti-wear additive technology for maximum corrosion protection, this formula offers advanced lubrication for extended engine life and prevents phosphorous depletion. It is NMMA FC-W CATALYST certified and approved for all 4-stroke applications including outboard, sterndrive, and inboard. Exceeds all 4-stroke requirements including FC-W and FC-W Cat Compatible.\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e","brand":"SIERRA","offers":[{"title":"Default Title","offer_id":50920033485119,"sku":"18-9400CAT-2","price":14.09,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0759\/8273\/3631\/files\/18-9400CAT-2.png?v=1757341009"},{"product_id":"10w-30-fc-w-4-stroke-boat-engine-oil-18-9420-2","title":"10W-30 FC-W 4-Stroke Oil, Qt, | 18-9420-2","description":"\u003cp\u003e\u003cspan\u003eHighly refined petroleum product formulated with premium base stock and highly refined additive. Excellent anti-wear characteristics. Formulated to meet or exceed the tough requirements of the Marine 4-Stroke motor manufacturers and to offer maximum corrosion protection. Reduces friction and sludge, keeping the engine cleaner for better efficiency. Meets and exceeds quality performance API SJ, CF-2, CH-4, NMMA FC-W Certified.\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e","brand":"SIERRA","offers":[{"title":"Default Title","offer_id":50920033747263,"sku":"18-9420-2","price":14.29,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0759\/8273\/3631\/files\/18-9420-2.png?v=1757321567"},{"product_id":"10w-30-fc-w-4-stroke-boat-engine-oil-18-9420-3","title":"10W-30 FC-W 4-Stroke Oil, Gal. | 18-9420-3","description":"\u003cp\u003e\u003cspan\u003eHighly refined petroleum product formulated with premium base stock and highly refined additive. Excellent anti-wear characteristics. Formulated to meet or exceed the tough requirements of the Marine 4-Stroke motor manufacturers and to offer maximum corrosion protection. Reduces friction and sludge, keeping the engine cleaner for better efficiency. Meets and exceeds quality performance API SJ, CF-2, CH-4, NMMA FC-W Certified.\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e","brand":"SIERRA","offers":[{"title":"Default Title","offer_id":50920033943871,"sku":"18-9420-3","price":48.49,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0759\/8273\/3631\/files\/18-9420-3.png?v=1757341022"},{"product_id":"10w-30-fc-w-4-stroke-catalyst-boat-engine-oil-18-9420cat-3","title":"10W-30 FC-W 4-Stroke Catalyst Oil, Gal | 18-9420CAT-3","description":"\u003cp\u003e\u003cspan\u003eCapitalizing on \"ZDDP\" anti-wear additive technology for maximum corrosion protection, this formula offers advanced lubrication for extended engine life and prevents phosphorous depletion. It is NMMA FC-W certified and approved for all 4-stroke applications including outboard, sterndrive, and inboard.\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e","brand":"SIERRA","offers":[{"title":"Default Title","offer_id":50920034304319,"sku":"18-9420CAT-3","price":41.89,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0759\/8273\/3631\/files\/18-9420CAT-3.png?v=1757321579"},{"product_id":"25w40-fc-w-synthetic-blend-boat-engine-oil-18-9440-3","title":"25W-40 FC-W Synthetic Blend Oil, 4L | 18-9440-3","description":"\u003cp\u003e\u003cspan\u003eBlended with premium grade synthetic and mineral based stock, combined with superior designed additives formulated for the extreme marine environment, this formula offers advanced lubrication of wear to internal engine components, along with superior corrosion protection and minimized piston ring deposits. Extensively tested for outstanding performance. NMMA FC-W Certified\/API-SL.\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e","brand":"SIERRA","offers":[{"title":"Default Title","offer_id":50920034435391,"sku":"18-9440-3","price":78.29,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0759\/8273\/3631\/files\/18-9440-3.png?v=1757321590"},{"product_id":"25w-40-fc-w-synthetic-blend-oil-18-9440-4","title":"25W-40 FC-W Synthetic Blend Oil, 5Qt. | 18-9440-4","description":"\u003cp\u003e\u003cspan\u003eThis 4-cycle oil blended with premium grade synthetic and mineral based stock features superiorly designed additives formulated for the stress endured by sterndrive and inboard engines. It offers advanced lubrication for reduction of wear to internal engine components, removes thermal breakdown under high RPMs, extreme temperatures, and loads, and is extensively tested for outstanding performance. NMMA FC-W Certified\/API-SL.\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e","brand":"SIERRA","offers":[{"title":"Default Title","offer_id":50920034468159,"sku":"18-9440-4","price":92.29,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0759\/8273\/3631\/files\/18-9440-4.png?v=1757341050"},{"product_id":"25w-40-fc-w-synthetic-blend-catalyst-engine-oil-18-9440cat-4","title":"25W-40 FC-W Synthetic Blend Catalyst Oil, 5 Qt. | 18-9440CAT-4","description":"\u003cp\u003e\u003cspan\u003eCapitalizing on \"ZDDP\" anti-wear additive technology for maximum corrosion protection, this formula offers advanced lubrication and deposit control for extended engine life and prevents phosphorous depletion. It is NMMA FC-W\/API-SL certified and approved for all 4-stroke applications including outboard, sterndrive, and inboard. \u003c\/span\u003e\u003c\/p\u003e","brand":"SIERRA","offers":[{"title":"Default Title","offer_id":50920034730303,"sku":"18-9440CAT-4","price":81.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0759\/8273\/3631\/files\/18-9440CAT-4.png?v=1757358030"},{"product_id":"20w40-fc-w-premium-blend-boat-engine-oil-18-9450-2","title":"20W-40 FC-W Premium Blend Oil, Qt | 18-9450-2","description":"\u003cp\u003e\u003cspan\u003eAdvanced additive package to prevent rust and corrosion. Developed to replace the 10W-30 in warmer climates. Formulated to protect your engine in the most demanding marine conditions. Prevents breakdown under high RPM and maximum load conditions. Meets or exceeds OE specifications for outboard oil.\u003c\/span\u003e\u003c\/p\u003e","brand":"SIERRA","offers":[{"title":"Default Title","offer_id":50920034828607,"sku":"18-9450-2","price":11.89,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0759\/8273\/3631\/files\/18-9450-2.png?v=1757358042"},{"product_id":"10w-40-fc-w-semi-synthetic-oil-boat-engine-oil-18-9551-2","title":"10W-40 FC-W Semi Synthetic Oil, Qt. | 18-9551-2","description":"\u003cp\u003e\u003cspan\u003eDirect Suzuki replacement oil. NMMA FC-W Certified\/API-SL. Semi-synthetic formulation for superior protection under high loads and operating stress.\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"SIERRA","offers":[{"title":"Default Title","offer_id":50920036565311,"sku":"18-9551-2","price":12.49,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0759\/8273\/3631\/files\/18-9551-2.png?v=1769447417"},{"product_id":"sierra-10w40-fc-w-semi-synthetic-engine-oil-18-9551-3","title":"10W-40 FC-W Semi-Synthetic Oil, Gal. | 18-9551-3","description":"\u003cp\u003e\u003cspan\u003eDirect Suzuki replacement oil. NMMA FC-W Certified\/API-SL. Semi-synthetic formulation for superior protection under high loads and operating stress.\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"SIERRA","offers":[{"title":"Default Title","offer_id":50920036696383,"sku":"18-9551-3","price":46.19,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0759\/8273\/3631\/files\/18-9551-3.png?v=1757358079"},{"product_id":"25w-50-fc-w-semi-synthetic-boat-engine-oil-18-9552-3","title":"25W-50 FC-W Semi-Synthetic Oil, 4L | 18-9552-3","description":"\u003cp\u003e\u003cspan\u003eFor use in supercharged Mercury Verado. NMMA FC-W Certified\/API-SL. Semi-synthetic formulation for superior protection under high loads and operating stress.\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e","brand":"SIERRA","offers":[{"title":"Default Title","offer_id":50920036761919,"sku":"18-9552-3","price":69.49,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0759\/8273\/3631\/files\/18-9552-3.png?v=1757321639"},{"product_id":"15w-40-multi-vehicle-boat-engine-oil-18-9554-2","title":"15W-40 Multi-Vehicle Oil, Qt. | 18-9554-2","description":"\u003cp\u003e\u003cspan\u003eMeets API Service classification up to CK-4. Meets the performance specifications for API service classification SM. NOT for use in gasoline engines equipped with catalytic converters. Specifically formulated for the heavy duty inboard marine market, including cruiser and towboats. Suitable for fuels on any sulfur level.\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e","brand":"SIERRA","offers":[{"title":"Default Title","offer_id":50920036860223,"sku":"18-9554-2","price":12.09,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0759\/8273\/3631\/files\/18-9554-2.png?v=1757358093"},{"product_id":"10w-30-fc-w-synthetic-boat-engine-oil-18-9690-2","title":"10W-30 FC-W Synthetic Oil, Qt. | 18-9690-2","description":"\u003cp\u003e\u003cspan\u003eFormulated specifically for 4-stroke outboard and sterndrive engine technology. Special blend of synthetic base oil and a balanced additive system that exceeds FC-W requirements. Excellent protection at high temperatures. Greater resistance to oxidation for lower oil consumption. Offers faster lubrication at start up in low temperatures. Recommended for use in both outboard and sterndrive applications. NMMA FC-W Certified\/API-SL.\u003c\/span\u003e\u003c\/p\u003e","brand":"SIERRA","offers":[{"title":"Default Title","offer_id":50920038334783,"sku":"18-9690-2","price":21.89,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0759\/8273\/3631\/files\/18-9690-2.png?v=1757358134"},{"product_id":"10w40-full-synthetic-catalyst-boat-engine-oil-18-9559cat-2","title":"10W-40 Full Synthetic Catalyst Oil, Qt. | 18-9559CAT-2","description":"\u003cp\u003e\u003cspan\u003eDeveloped for excellent protection against severe wear at both high and low temperatures in high performing engines. Fully synthetic oil. Approved for year-round use.\u003c\/span\u003e\u003c\/p\u003e","brand":"SIERRA","offers":[{"title":"Default Title","offer_id":50920071004479,"sku":"18-9559CAT-2","price":17.59,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0759\/8273\/3631\/files\/18-9559CAT-2.png?v=1757364610"},{"product_id":"10w-40-full-synthetic-catalyst-boat-engine-oil-18-9559cat-3","title":"10W-40 Full Synthetic Catalyst Oil, Gal. | 18-9559CAT-3","description":"\u003cp\u003e\u003cspan\u003eDeveloped for excellent protection against severe wear at both high and low temperatures in high performing engines. Fully synthetic oil. Approved for year-round use.\u003c\/span\u003e\u003c\/p\u003e","brand":"SIERRA","offers":[{"title":"Default Title","offer_id":50920071070015,"sku":"18-9559CAT-3","price":67.89,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0759\/8273\/3631\/files\/18-9559CAT-3.png?v=1757331467"},{"product_id":"dexos-5w-30-full-synthetic-engine-oil-qt-18-9470-2","title":"Dexos 5W-30 Full Synthetic Engine Oil, Qt | 18-9470-2","description":"\u003cp\u003e\u003cspan\u003eSierra's Dexos 5W-30 Full Synthetic Engine Oil, formulated to meet the latest performance needs of modern gasoline engines, including those equipped with turbochargers and direct-injection systems. This premium synthetic lubricant delivers superior engine protection, fuel efficiency, and long-term reliability. This oil is GM Dexos® 1 Gen 3 Approved and meets or exceeds the latest Dexos requirements for modern GM engines. This oil features excellent wear protection, thermal stability and oxidation resistance along with improved fuel economy. It contains advanced detergents to help control sludge, varnish and deposits across extreme temperatures.\u003c\/span\u003e\u003c\/p\u003e","brand":"SIERRA","offers":[{"title":"Default Title","offer_id":52279483433279,"sku":"18-9470-2","price":11.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0759\/8273\/3631\/files\/18-9470-2.png?v=1771860120"},{"product_id":"dexos-5w-30-full-synthetic-engine-oil-5-qt-18-9470-4","title":"Dexos 5W-30 Full Synthetic Engine Oil, 5 Qt | 18-9470-4","description":"\u003cp\u003e\u003cspan\u003eSierra's Dexos 5W-30 Full Synthetic Engine Oil, formulated to meet the latest performance needs of modern gasoline engines, including those equipped with turbochargers and direct-injection systems. This premium synthetic lubricant delivers superior engine protection, fuel efficiency, and long-term reliability. This oil is GM Dexos® 1 Gen 3 Approved and meets or exceeds the latest Dexos requirements for modern GM engines. This oil features excellent wear protection, thermal stability and oxidation resistance along with improved fuel economy. It contains advanced detergents to help control sludge, varnish and deposits across extreme temperatures.\u003c\/span\u003e\u003c\/p\u003e","brand":"SIERRA","offers":[{"title":"Default Title","offer_id":52279483498815,"sku":"18-9470-4","price":56.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0759\/8273\/3631\/files\/18-9470-4.png?v=1771860140"},{"product_id":"oil-change-kit-yamaha-f75-f115-all-years","title":"Oil Change Kit: Yamaha F75-F115 All Years","description":"\u003cp\u003eMake oil changes easy with Sierra's oil change kit for Yamaha Outboard models F75, F80, F90, F100 and F115 all years.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKit Contains\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cspan\u003e10W-30 FC-W 4-Stroke Oil, Qt | \u003c\/span\u003e\u003ca href=\"https:\/\/www.sierraparts.com\/products\/10w-30-fc-w-4-stroke-boat-engine-oil-18-9420-2\"\u003e\u003cspan style=\"text-decoration: underline;\"\u003e18-9420-2\u003c\/span\u003e\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eOil Pan Drain Gasket | 18-0755\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eOil Filter | \u003ca href=\"https:\/\/www.sierraparts.com\/products\/18-7911-1\"\u003e\u003cspan style=\"text-decoration: underline;\"\u003e18-7911-1\u003c\/span\u003e\u003c\/a\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eOil Change Funnel | 18-0003\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SIERRA","offers":[{"title":"Default Title","offer_id":52712669348159,"sku":"18-9391-1","price":63.39,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0759\/8273\/3631\/files\/18-9391-1_OilChangeKit_p400.png?v=1775748271"}],"url":"https:\/\/www.sierraparts.com\/collections\/4-stroke-boat-oil.oembed","provider":"SIERRA","version":"1.0","type":"link"}