{"product_id":"mercury-synthetic-blend-4-stroke-25w-40-marine-oil-gallon-92-8m0078630","title":"Mercury – SAE 25W-40 Synthetic 4-Stroke Marine Oil, 1 Gallon | Lubrication | 92-8M0078630","description":"\u003cp data-start=\"0\" data-end=\"89\"\u003eMercury – SAE 25W-40 Synthetic 4-Stroke Marine Oil, 1 Gallon | Lubrication | 92-8M0078630\u003c\/p\u003e\n\u003chr data-start=\"91\" data-end=\"94\"\u003e\n\u003ch3 data-start=\"96\" data-end=\"110\"\u003eOverview\u003c\/h3\u003e\n\u003cp data-start=\"111\" data-end=\"637\"\u003eFour-stroke marine engines don’t get an easy break. They idle for long stretches, jump straight into hard throttle, and spend their whole life in heat and humidity. That’s why the oil you pick matters. This 25W-40 synthetic blend is the kind of oil most mechanics stick with because it hangs onto its thickness, keeps metal parts coated on cold starts, and does a solid job fighting the corrosion that sneaks into every marine engine. If you want your motor to stay strong season after season, this is the kind of oil you run.\u003c\/p\u003e\n\u003chr data-start=\"639\" data-end=\"642\"\u003e\n\u003ch3 data-start=\"644\" data-end=\"662\"\u003eKey Features\u003c\/h3\u003e\n\u003cp data-start=\"663\" data-end=\"1082\"\u003e • \u003cstrong data-start=\"666\" data-end=\"700\"\u003eFor Any 4-Stroke Marine Engine\u003c\/strong\u003e – Outboards, sterndrives, inboards—they all run well on it.\u003cbr data-start=\"760\" data-end=\"763\"\u003e • \u003cstrong data-start=\"766\" data-end=\"794\"\u003eSynthetic Marine Formula\u003c\/strong\u003e – Built to handle salt, heat, and long run times.\u003cbr data-start=\"844\" data-end=\"847\"\u003e • \u003cstrong data-start=\"850\" data-end=\"880\"\u003eHolds Viscosity Under Load\u003c\/strong\u003e – Doesn’t thin out when things get hot.\u003cbr data-start=\"920\" data-end=\"923\"\u003e • \u003cstrong data-start=\"926\" data-end=\"943\"\u003e25W-40 Weight\u003c\/strong\u003e – A favorite viscosity for many Mercury four-strokes.\u003cbr data-start=\"997\" data-end=\"1000\"\u003e • \u003cstrong data-start=\"1003\" data-end=\"1019\"\u003e1-Gallon Jug\u003c\/strong\u003e – Enough to handle a full oil change on most mid-size engines.\u003c\/p\u003e\n\u003chr data-start=\"1084\" data-end=\"1087\"\u003e\n\u003ch3 data-start=\"1089\" data-end=\"1122\"\u003eEngine \u0026amp; Boat Compatibility\u003c\/h3\u003e\n\u003cp data-start=\"1123\" data-end=\"1246\"\u003e • 4-stroke outboards\u003cbr data-start=\"1144\" data-end=\"1147\"\u003e • MerCruiser sterndrives\u003cbr data-start=\"1172\" data-end=\"1175\"\u003e • Inboard 4-stroke engines\u003cbr data-start=\"1202\" data-end=\"1205\"\u003e • FC-W and FC-W catalyst-rated systems\u003c\/p\u003e\n\u003chr data-start=\"1248\" data-end=\"1251\"\u003e\n\u003ch3 data-start=\"1253\" data-end=\"1291\"\u003ePerformance \u0026amp; Practical Benefits\u003c\/h3\u003e\n\u003cp data-start=\"1292\" data-end=\"1720\"\u003eMost motors feel noticeably smoother once they’re running on fresh 25W-40. Idle settles down, cold starts don’t sound as harsh, and the engine feels a bit more confident when you push the throttle forward. The oil holds up well over long days, so you don’t get that thin, noisy feel older oil can cause. It also keeps varnish and sludge from building up, which makes life easier when you’re maintaining the engine down the road.\u003c\/p\u003e\n\u003chr data-start=\"1722\" data-end=\"1725\"\u003e\n\u003ch3 data-start=\"1727\" data-end=\"1744\"\u003eWhy Buy OEM\u003c\/h3\u003e\n\u003cp data-start=\"1745\" data-end=\"2045\"\u003eMercury blends this oil for the exact kind of punishment marine engines deal with—heat under the cowling, moisture in the air, long idle cycles, and quick bursts to high RPM. Automotive oils simply aren’t built for that. With OEM oil, you know you’re giving the engine what it was designed to run on.\u003c\/p\u003e\n\u003chr data-start=\"2047\" data-end=\"2050\"\u003e\n\u003ch3 data-start=\"2052\" data-end=\"2061\"\u003eFAQ\u003c\/h3\u003e\n\u003cp data-start=\"2062\" data-end=\"2215\"\u003e\u003cstrong data-start=\"2062\" data-end=\"2107\"\u003eQ1: How often should this oil be changed?\u003c\/strong\u003e\u003cbr data-start=\"2107\" data-end=\"2110\"\u003e\u003cstrong data-start=\"2110\" data-end=\"2116\"\u003eA:\u003c\/strong\u003e Most boaters change it once per season or at the recommended service hours, whichever comes first.\u003c\/p\u003e\n\u003cp data-start=\"2217\" data-end=\"2349\"\u003e\u003cstrong data-start=\"2217\" data-end=\"2261\"\u003eQ2: Is mixing this with other oils okay?\u003c\/strong\u003e\u003cbr data-start=\"2261\" data-end=\"2264\"\u003e\u003cstrong data-start=\"2264\" data-end=\"2270\"\u003eA:\u003c\/strong\u003e Better not. Keeping one formula in the engine gives you consistent protection.\u003c\/p\u003e\n\u003cp data-start=\"2351\" data-end=\"2476\"\u003e\u003cstrong data-start=\"2351\" data-end=\"2390\"\u003eQ3: Is it safe for saltwater boats?\u003c\/strong\u003e\u003cbr data-start=\"2390\" data-end=\"2393\"\u003e\u003cstrong data-start=\"2393\" data-end=\"2399\"\u003eA:\u003c\/strong\u003e Yes—its corrosion-fighting additives are meant for exactly that environment.\u003c\/p\u003e\n\u003cp data-start=\"2478\" data-end=\"2608\"\u003e\u003cstrong data-start=\"2478\" data-end=\"2513\"\u003eQ4: Will this help cold starts?\u003c\/strong\u003e\u003cbr data-start=\"2513\" data-end=\"2516\"\u003e\u003cstrong data-start=\"2516\" data-end=\"2522\"\u003eA:\u003c\/strong\u003e It usually does. The synthetic blend sticks to parts better, so starts aren’t as dry.\u003c\/p\u003e\n\u003cp data-start=\"2610\" data-end=\"2749\"\u003e\u003cstrong data-start=\"2610\" data-end=\"2643\"\u003eQ5: Why avoid automotive oil?\u003c\/strong\u003e\u003cbr data-start=\"2643\" data-end=\"2646\"\u003e\u003cstrong data-start=\"2646\" data-end=\"2652\"\u003eA:\u003c\/strong\u003e Car oil breaks down too fast in marine heat and humidity. Marine engines need something tougher.\u003c\/p\u003e","brand":"Mercury","offers":[{"title":"Default Title","offer_id":45626521747747,"sku":"92-8M0078630","price":57.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0783\/7410\/9475\/files\/8m0078630_main.jpg?v=1760631362","url":"https:\/\/partsvu.com\/en-au\/products\/mercury-synthetic-blend-4-stroke-25w-40-marine-oil-gallon-92-8m0078630","provider":"PartsVu","version":"1.0","type":"link"}