{"product_id":"valvoline-heavy-duty-full-synthetic-15w-40-diesel-engine","title":"Valvoline Heavy Duty Full Synthetic 15W-40 Diesel Engine","description":"\u003cp\u003e\u003cstrong\u003eValvoline Heavy Duty Full Synthetic 15W-40 is a fully synthetic diesel engine oil designed to protect heavy-duty engines from wear, deposits, and oil breakdown across extreme temperatures and demanding duty cycles.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis full synthetic 15W-40 diesel oil is engineered for heavy equipment, on-highway trucks and agricultural machinery that face severe operating conditions. Formulated with advanced base stocks and targeted additives, it delivers enhanced viscosity control, oxidation stability and extended drain potential while meeting multiple OEM and industry specifications. Whether you run a mixed fleet or maintain high-hour construction gear, this product is built to extend component life and support low-emission systems.\u003c\/p\u003e\n\n\u003ch3\u003eHow does this oil protect engines under heavy load?\u003c\/h3\u003e\n\u003cp\u003eValvoline’s formulation focuses on reducing metal-to-metal contact and slowing deposit formation during intense duty cycles. The additive package includes anti-wear agents, detergents and dispersants that stabilize oil under high temperature and soot-loading conditions.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eProven 35% reduction in valve train wear in Cummins ISB testing\u003c\/li\u003e\n  \u003cli\u003eDetergent chemistry controls deposits for cleaner pistons and rings\u003c\/li\u003e\n  \u003cli\u003eOxidation inhibitors maintain film strength at elevated temperatures\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill it extend oil life and service intervals?\u003c\/h3\u003e\n\u003cp\u003eThe full synthetic base oils and enhanced oxidation stability help the oil resist breakdown, allowing for longer effective drain intervals compared with many industry-standard products. Field and engine bench tests show measurable improvements in oil longevity.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eUp to 28% longer oil life in Volvo T-13 engine testing versus industry norms\u003c\/li\u003e\n  \u003cli\u003eBetter thermal and shear stability preserves viscosity over time\u003c\/li\u003e\n  \u003cli\u003eHelps reduce sludge and varnish accumulation that shortens oil life\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhich engines and OEM approvals does it support?\u003c\/h3\u003e\n\u003cp\u003eThis 15W-40 meets a broad set of specifications and is suitable for many modern and legacy diesel engines. It’s formulated to be compatible with common aftertreatment and emission systems when used per manufacturer guidance.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eAPI CK-4, CJ-4, CI-4 PLUS, CI-4, CH-4 and SN compliant\u003c\/li\u003e\n  \u003cli\u003eRecommended or approved for Cummins CES 20086, Volvo VDS-4.5, Mack EOS-4.5\u003c\/li\u003e\n  \u003cli\u003eAlso meets Detroit Diesel DFS 93K222, Caterpillar ECF-3, Ford WSS-M2C171-F1\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow does it perform in different climates and operating conditions?\u003c\/h3\u003e\n\u003cp\u003eThe 15W-40 viscosity grade provides reliable start-up flow and protective film strength across a wide temperature range. Its formulation offers year-round performance so equipment can remain protected through heat, cold and variable workloads.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e15W low-temperature flow for easier cold starts and lubrication\u003c\/li\u003e\n  \u003cli\u003eStable high-temperature viscosity to protect under sustained heavy load\u003c\/li\u003e\n  \u003cli\u003eDesigned for construction, fleet, agricultural and mixed-use equipment\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: Operators, fleet managers and maintenance professionals who need a resilient, multi-specification diesel engine oil that balances wear protection, deposit control and extended service life. Ideal for mixed fleets and heavy-duty equipment where OEM compatibility, year-round performance and longer oil life reduce downtime and lower lifecycle costs.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Is this oil compatible with my diesel truck's emission system?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. It meets API CK-4\/CJ-4 and OEM specs like Volvo VDS-4.5 and Caterpillar ECF-3; follow your manufacturer’s guidelines for aftertreatment compatibility.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can I use this 15W-40 year-round?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The full synthetic 15W-40 offers reliable low-temperature flow and high-temperature stability for year-round protection.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Valvoline","offers":[{"title":"Default Title","offer_id":48087473356958,"sku":"B0FBQRGY8K","price":37.95,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/valvoline-15w40-1g-front-label.jpg?v=1785924517","url":"https:\/\/northtrailauto.ca\/products\/valvoline-heavy-duty-full-synthetic-15w-40-diesel-engine","provider":"North Trail Auto","version":"1.0","type":"link"}