{"product_id":"schaeffer-manufacturing-co-synshield-ultra-10w-30-diesel-engine-oil-1-gallon-ck-4-synthetic-plus-protection","title":"Schaeffer Manufacturing Co SynShield Ultra 10W-30 Diesel Engine Oil, 1-Gallon — CK-4 Synthetic-Plus Protection","description":"\u003cp\u003e\u003cstrong\u003eSchaeffer SynShield Ultra Performance 10W-30 is a synthetic-plus heavy-duty diesel engine oil designed to protect engines under severe on- and off-highway conditions.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eBuilt from Schaeffer Manufacturing Co.'s advanced formulation, SynShield Ultra blends synthetic components with targeted friction modifiers to reduce wear, control soot and stabilize viscosity during demanding duty cycles. It meets and exceeds API CK-4 performance requirements and is intended for modern diesel engines — including 2007 and 2010 emission-compliant units — that operate with heavy EGR, diesel particulate filters (DPFs), diesel oxidation catalysts (DOCs) and selective catalytic reduction (SCR) systems. This product is formulated to perform in stop-and-go work, frequent idling, short haul and other severe-service applications where durability and deposit control matter.\u003c\/p\u003e\n\n\u003ch3\u003eHow does SynShield Ultra 10W-30 protect engine components under heavy loads?\u003c\/h3\u003e\n\u003cp\u003eSynShield Ultra uses Schaeffer's proprietary friction modifiers and targeted additives to form a durable, slippery barrier between metal surfaces. That reduces direct metal-to-metal contact and slows down component wear across bearings, pistons, rings, cylinders and valve train parts.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eMicron Moly and Penetro friction modifiers reduce friction at contact points\u003c\/li\u003e\n  \u003cli\u003eOxidation inhibitors preserve oil life in high-temperature cycles\u003c\/li\u003e\n  \u003cli\u003eViscosity control minimizes thinning under load for consistent film strength\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill this oil help keep soot and deposits under control in EGR-equipped engines?\u003c\/h3\u003e\n\u003cp\u003eYes. The formulation emphasizes soot handling and dispersant chemistry to suspend and disperse soot particles, which helps prevent sludge and thick deposits in engines with heavy exhaust gas recirculation. That contributes to cleaner oil and extended service intervals when used correctly.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eHigh soot-dispersion capacity reduces deposit build-up\u003c\/li\u003e\n  \u003cli\u003eDetergents and dispersants maintain combustion-area cleanliness\u003c\/li\u003e\n  \u003cli\u003eWorks with after-treatment devices such as DPFs and DOCs\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCan SynShield Ultra 10W-30 improve fuel economy or reduce oil consumption?\u003c\/h3\u003e\n\u003cp\u003eWhile exact savings vary by vehicle and duty cycle, the friction-modified formula aims to lower parasitic losses, which can translate to modest fuel economy gains in real-world operation. Improved viscosity control and anti-oxidation chemistry also help limit oil consumption over time.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eFriction modifiers reduce internal drag for potential fuel savings\u003c\/li\u003e\n  \u003cli\u003eViscosity stability reduces volatility and oil burn-off\u003c\/li\u003e\n  \u003cli\u003eOxidation resistance extends effective oil life between changes\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat types of equipment and service conditions is this 10W-30 best suited for?\u003c\/h3\u003e\n\u003cp\u003eSynShield Ultra 10W-30 is engineered for heavy-duty diesel environments — both on-road and off-road — where engines face severe duty, including frequent idling, short-haul cycles, and high soot loads. It supports later-model emission systems and is compatible with many diesel platforms requiring API CK-4 oils.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eOn-highway trucks and vocational vehicles exposed to stop-and-go traffic\u003c\/li\u003e\n  \u003cli\u003eOff-highway heavy equipment and construction machinery operating in harsh conditions\u003c\/li\u003e\n  \u003cli\u003eFleets and mixed-use equipment that require modern emission-compliant lubricants\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: Schaeffer SynShield Ultra Performance 10W-30 is intended for fleet managers, mechanics and owners of diesel-powered vehicles and equipment that demand extended durability, strong soot control and compatibility with modern after-treatment technologies. Choose this oil if you need a heavy-duty 10W-30 that balances wear protection, viscosity stability and deposit control for severe-service diesel applications.\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 SynShield Ultra 10W-30 compatible with diesel particulate filters (DPFs)?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The formulation supports engines with DPFs and DOCs and is suitable for 2007 and 2010 emission-compliant systems.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Does this oil meet API specifications?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: It meets and exceeds API CK-4 specifications for heavy-duty diesel engines.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Schaeffer Manufacturing Co","offers":[{"title":"Default Title","offer_id":48084061388958,"sku":"B06XG8KD84","price":87.48,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/schaeffer-synshield-10w30-gallon-front-label.jpg?v=1785845092","url":"https:\/\/northtrailauto.ca\/products\/schaeffer-manufacturing-co-synshield-ultra-10w-30-diesel-engine-oil-1-gallon-ck-4-synthetic-plus-protection","provider":"North Trail Auto","version":"1.0","type":"link"}