{"product_id":"lucas-oil-15w-40-heavy-duty-motor-oil-1-gallon-api-ck-4-anti-wear-thermal-stability","title":"Lucas Oil 15W-40 Heavy-Duty Motor Oil 1 Gallon — API CK-4, Anti-Wear \u0026 Thermal Stability","description":"\u003cp\u003e\u003cstrong\u003eLucas Oil 10287 SAE 15W-40 API CK-4 Heavy Duty Motor Oil is a one-gallon, high-performance diesel engine oil formulated to protect modern heavy-duty engines while supporting fuel economy and extended drain intervals.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis heavy-duty motor oil combines high-quality API Group II and Group III base stocks with an advanced additive package engineered to meet CK-4 specifications. It is designed for turbocharged, naturally aspirated, and aftercooled diesel engines, offering thermal stability, deposit control, and protection under high stress. The formula aims to balance wear reduction and soot handling for demanding commercial, agricultural, and construction applications.\u003c\/p\u003e\n\n\u003ch3\u003eHow does this 15W-40 oil protect engines under heavy loads?\u003c\/h3\u003e\n\u003cp\u003eLucas Oil 15W-40 CK-4 contains robust anti-wear and detergent additives that form a durable lubricant film across metal surfaces. That film helps reduce scoring and component wear during high-torque, high-temperature operation.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eAPI CK-4 performance level for modern diesel engines\u003c\/li\u003e\n  \u003cli\u003eEnhanced anti-wear chemistry to protect bearings and cam lobes\u003c\/li\u003e\n  \u003cli\u003eDetergents and dispersants to control soot-related wear\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill this motor oil support longer drain intervals and lower maintenance?\u003c\/h3\u003e\n\u003cp\u003eThe blend’s thermal and oxidation stability contributes to longer oil life compared with lesser-quality fluids, helping maintain viscosity and reduce sludge formation over time. While exact interval gains depend on duty cycle and engine condition, the formulation is intended to stretch service periods when used with proper monitoring.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eStable viscosity retention under heat\u003c\/li\u003e\n  \u003cli\u003eReduced oxidation and sludge for extended service life\u003c\/li\u003e\n  \u003cli\u003eCan reduce frequency of filter replacements with clean-running engines\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eIs this oil suitable for modern emissions-equipped diesel engines?\u003c\/h3\u003e\n\u003cp\u003eYes—Lucas Oil 15W-40 CK-4 is formulated to be compatible with contemporary diesel engines that require CK-4 performance. It’s engineered to work with aftertreatment systems when service instructions from the vehicle manufacturer are followed.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCK-4 rating aligns with modern heavy-duty diesel requirements\u003c\/li\u003e\n  \u003cli\u003eDesigned for turbocharged and aftercooled engines\u003c\/li\u003e\n  \u003cli\u003eFormulated to be compatible with common emission-control technologies when used as directed\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow does this oil balance protection and fuel economy?\u003c\/h3\u003e\n\u003cp\u003eThe base stock selection (Group II and III) and additive balance are chosen to minimize friction and maintain film strength, which helps engines run efficiently while protecting parts. That combination targets improved mechanical efficiency without sacrificing durability.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eLower friction base stocks for smoother operation\u003c\/li\u003e\n  \u003cli\u003eAdditives tuned to protect while supporting fuel-efficient running\u003c\/li\u003e\n  \u003cli\u003eMaintains viscosity for consistent performance across temperatures\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for? Lucas Oil 10287 SAE 15W-40 API CK-4 is aimed at fleet operators, contractors, farmers, and owners of medium- and heavy-duty diesel vehicles who need a dependable, CK-4-rated motor oil that balances wear protection, soot control, and potential for extended drains. Always follow the engine manufacturer’s specifications and monitoring practices to determine the optimal service interval for your application.\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 Lucas Oil 15W-40 CK-4 compatible with older diesel engines?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. CK-4 oils can be used in many older diesel engines, but always check your engine maker’s viscosity and spec recommendations first.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can this oil be used for extended drain intervals?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: The formulation supports longer drains compared to lower-grade oils, but actual intervals depend on operating conditions and oil analysis.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Lucas Oil","offers":[{"title":"Default Title","offer_id":67589531467961,"sku":"B074PBRFHJ","price":92.08,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0822\/3765\/3177\/files\/lucas-oil-10287-gallon-front.jpg?v=1790530641","url":"https:\/\/redleafauto.ca\/products\/lucas-oil-15w-40-heavy-duty-motor-oil-1-gallon-api-ck-4-anti-wear-thermal-stability","provider":"Redleaf Auto","version":"1.0","type":"link"}