{"id":2323,"date":"2025-07-30T22:52:42","date_gmt":"2025-07-30T15:52:42","guid":{"rendered":"https:\/\/www.dextrous-lubricant.com\/?post_type=product&p=2323"},"modified":"2026-07-14T15:53:57","modified_gmt":"2026-07-14T08:53:57","slug":"heavy-duty-synthetic-diesel-oil-15w-40","status":"publish","type":"product","link":"https:\/\/www.dextrous-lubricant.com\/en\/product\/heavy-duty-synthetic-diesel-oil-15w-40\/","title":{"rendered":"15W-40 Heavy-Duty 100% Synthetic Diesel Oil"},"content":{"rendered":"

\"\"Heavy-Duty 100% Synthetic Diesel Oil<\/strong><\/a><\/p>\n

 <\/p>\n

General Information<\/strong><\/p>\n

AMSOIL Heavy-Duty Synthetic Diesel Oil is specifically formulated for heavy-duty diesel engines. It offers four times better wear protection<\/strong> compared to the Detroit Diesel DD13 standard, delivering outstanding engine performance. It also maintains excellent flow properties in cold temperatures (resists thickening) and withstands high heat under heavy-duty conditions.<\/p>\n

\n

Maximum Engine Protection<\/strong><\/p>\n

Wear typically occurs around the piston rings and cylinder walls, leading to increased oil consumption and reduced compression in the combustion chamber. This results in decreased engine power and higher fuel consumption. Independent testing shows that AMSOIL Heavy-Duty Synthetic Diesel Oil delivers up to 4 times better performance<\/strong> compared to other leading brands (see illustration).<\/p>\n

\"Screenshot-2024-04-02-145137.png\"<\/a><\/p>\n

\n

Viscosity Control<\/strong><\/p>\n

AMSOIL Heavy-Duty Synthetic Diesel Oil uses high-quality base oils, detergents, and dispersants to minimize changes in viscosity<\/strong> due to soot and contaminants. It prevents sludge and soot from clumping into larger particles, which are a leading cause of engine wear. The oil also has a lower volatility<\/strong>, helping to maintain viscosity even under high temperatures. This translates to better engine protection and improved fuel efficiency.<\/p>\n

\n

Outstanding Performance in Extreme Temperatures<\/strong><\/p>\n

This synthetic diesel oil resists thermal breakdown and oxidation far better than conventional oils. It allows the engine to operate efficiently under high heat. In extremely cold conditions, it continues to flow smoothly, ensuring easier oil circulation during startup and protecting the engine during those crucial first moments.<\/p>\n

\n

Reduced Oil Consumption<\/strong><\/p>\n

The AMSOIL Heavy-Duty Synthetic Diesel Oil formula is engineered with low volatility<\/strong> (burn-off), minimizing oil loss during operation. Test results show it reduces oil consumption by up to 66%<\/strong> compared to the CK-4 standard.<\/p>\n

\"Screenshot-2024-04-02-145407.png\"<\/a><\/p>\n

\n

Applications<\/strong><\/p>\n

AMSOIL Heavy-Duty Synthetic Diesel Oil is ideal for both diesel and gasoline engines requiring the following specifications:<\/p>\n

API SN, CK-4, CJ-4, CI-4+, CF; Volvo VDS4.5, VDS4, VDS3; Mack EOS-4.5, EO-O; Renault RLD-4, RLD-3; Cummins CES20086, CES20081; Caterpillar ECF-3, ECF-2, ECF-1-a; DDC 93K218, 93K215, 93K214; DFS 93K222; ACEA E9, E7; MB 228.31; MAN 3575; MTU Type 2.1, II, I; JASO DH-2; Deutz DQC III-10LA; Chrysler MS 10902; Ford WSS-M2C171-F1<\/span><\/p>\n

\n

Compatibility with Other Oils<\/strong><\/p>\n

AMSOIL Heavy-Duty Synthetic Diesel Oil is compatible with other synthetic and conventional engine oils. However, mixing may reduce its performance and shorten its service life. AMSOIL does not guarantee extended drain intervals<\/strong> when mixed with other oils, and the use of aftermarket oil additives is not recommended<\/strong>.<\/p>\n

\n

Service Life<\/strong><\/p>\n

AMSOIL Heavy-Duty Synthetic Diesel Oil is recommended for the drain intervals stated by the original equipment manufacturer (OEM). Refer to the owner\u2019s manual <\/span>for the specific oil change interval. Intervals may be extended beyond the OEM-recommended interval with oil analy<\/span>sis. Provides lasting protection for multiple events during competition. Use oil analysis to determine appropriate drain interval for competition use or when extending drain intervals beyond the OEM recommendation.<\/span><\/p>\n

\n

Specifications<\/u><\/b><\/p>\n

\"\"<\/div>\n","protected":false},"excerpt":{"rendered":"

Formulated for Exceptional Diesel Engine Protection<\/strong><\/p>\n

AMSOIL Heavy-Duty Synthetic Diesel Oil is formulated for hard-working equipment. It is engineered to provide 4X better wear protection, giving you the edge to keep trucks and equipment operating at peak performance. AMSOIL Heavy-Duty Synthetic Diesel Oil offers outstanding value and provides excellent protection for customers seeking an upgrade over conventional, synthetic-blend or competing synthetic diesel oils.<\/p>\n","protected":false},"featured_media":3488,"template":"","meta":[],"product_brand":[],"product_cat":[104],"product_tag":[],"class_list":["post-2323","product","type-product","status-publish","has-post-thumbnail","product_cat-15000-20000-km","first","instock","shipping-taxable","product-type-simple"],"yoast_head":"\n15W-40 Heavy-Duty 100% Synthetic Diesel Oil - dextrous-lubricant<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.dextrous-lubricant.com\/en\/product\/heavy-duty-synthetic-diesel-oil-15w-40\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"15W-40 Heavy-Duty 100% Synthetic Diesel Oil - dextrous-lubricant\" \/>\n<meta property=\"og:description\" content=\"Formulated for Exceptional Diesel Engine Protection AMSOIL Heavy-Duty Synthetic Diesel Oil is formulated for hard-working equipment. 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