{"product_id":"yamalube-20w-40-full-synthetic-4m-fc-w-marine-engine-oil-gallon-lub-20w40-fc-04-oem","title":"Yamalube 20W-40 Full Synthetic 4M FC-W Marine Engine Oil – Gallon – LUB-20W40-FC-04 – OEM","description":"\u003ch3 data-start=\"107\" data-end=\"203\"\u003e\u003cstrong data-start=\"110\" data-end=\"203\"\u003eYamalube 20W-40 Full Synthetic 4M FC-W Marine Engine Oil – Gallon – LUB-20W40-FC-04 – OEM\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp data-start=\"205\" data-end=\"654\"\u003eYamalube 20W-40 Full Synthetic 4M FC-W Marine Engine Oil is Yamaha’s premium marine-formulated lubricant engineered specifically for 4-stroke outboards operating under high-load, high-rpm conditions. Designed to meet and exceed NMMA® FC-W® certification standards, this advanced full synthetic formula provides superior protection against wear, corrosion, varnish, and sludge while maintaining viscosity stability in demanding marine environments.\u003c\/p\u003e\n\u003cp data-start=\"656\" data-end=\"1058\"\u003eUnlike automotive oil—formulated for engines typically cruising around 2,500 RPM—outboards commonly operate between 4,500 and 6,000 RPM for extended periods. That level of sustained stress can quickly break down conventional oils. Yamalube 4M FC-W is engineered to resist foaming, thermal breakdown, and moisture-related corrosion, delivering dependable protection during continuous throttle operation.\u003c\/p\u003e\n\u003cp data-start=\"656\" data-end=\"1058\"\u003e\u003cstrong data-start=\"1331\" data-end=\"1346\"\u003eWhy 20W-40?\u003c\/strong\u003e\u003cbr data-start=\"1346\" data-end=\"1349\"\u003e20W-40 provides a thicker oil film at operating temperature compared to lighter viscosities like 10W-30. This makes it especially beneficial for high-temperature climates, sustained throttle use, and heavy-load applications where added film strength and shear stability are critical.\u003c\/p\u003e\n\u003cp data-start=\"1060\" data-end=\"1225\"\u003e\u003cstrong data-start=\"1060\" data-end=\"1074\"\u003eViscosity:\u003c\/strong\u003e 20W-40\u003cbr data-start=\"1081\" data-end=\"1084\"\u003e\u003cstrong data-start=\"1084\" data-end=\"1102\"\u003eCertification:\u003c\/strong\u003e NMMA® FC-W®\u003cbr data-start=\"1114\" data-end=\"1117\"\u003e\u003cstrong data-start=\"1117\" data-end=\"1126\"\u003eType:\u003c\/strong\u003e Full Synthetic 4-Stroke Marine Engine Oil (4M)\u003cbr data-start=\"1173\" data-end=\"1176\"\u003e\u003cstrong data-start=\"1176\" data-end=\"1185\"\u003eSize:\u003c\/strong\u003e Gallon\u003cbr data-start=\"1192\" data-end=\"1195\"\u003e\u003cstrong data-start=\"1195\" data-end=\"1225\"\u003eGenuine Yamaha OEM Product\u003c\/strong\u003e\u003c\/p\u003e","brand":"Yamaha","offers":[{"title":"Default Title","offer_id":44021380317244,"sku":null,"price":36.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0707\/6347\/9100\/files\/2040gal.jpg?v=1772747022","url":"https:\/\/compleatanglermarine.com\/products\/yamalube-20w-40-full-synthetic-4m-fc-w-marine-engine-oil-gallon-lub-20w40-fc-04-oem","provider":"Compleat Angler Marine ","version":"1.0","type":"link"}