{"product_id":"schaeffer-manufacturing-co-synshield-otr-plus-5w-40-full-synthetic-diesel-engine-oil-1-quart-bottles-pack-of-12-api-ck-4-dpf","title":"Schaeffer Manufacturing Co SynShield OTR Plus 5W-40 Full Synthetic Diesel Engine Oil — 1-Quart Bottles (Pack of 12), API CK-4, DPF","description":"\u003cstrong\u003eSchaeffer SynShield OTR Plus 5W-40 is a full synthetic, heavy-duty diesel engine oil engineered to protect modern, emission-equipped diesel engines while supporting fuel economy and durability.\u003c\/strong\u003e\n\n\u003cp\u003eDesigned for on- and off-road heavy-duty diesel applications, this 1-quart bottle sold in a pack of 12 brings a balanced combination of high-temperature strength and cold-start performance. Formulated to meet API CK-4 standards, SynShield OTR Plus 5W-40 works with 2007 and 2010 emission-compliant systems that use heavy EGR and after-treatment devices such as DPFs, DOCs and SCR. Proprietary friction modifiers and advanced detergency help control soot and deposits so engines run cleaner and more efficiently.\u003c\/p\u003e\n\n\u003ch3\u003eHow does SynShield OTR Plus protect engines under heavy duty conditions?\u003c\/h3\u003e\n\u003cp\u003eSynShield OTR Plus is built to resist wear and thermal breakdown in high-stress diesel environments. Its full synthetic base provides a stronger oil film at elevated temperatures while additives minimize metal-to-metal contact and reduce abrasive wear from soot.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eFriction modifiers Micron Moly and Penetro form a protective, slippery layer.\u003c\/li\u003e\n  \u003cli\u003eHigh-heat stability maintains oil strength under heavy loads.\u003c\/li\u003e\n  \u003cli\u003eDetergents and dispersants combat soot-related abrasion and deposits.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill this oil work with emission systems like DPFs and SCR?\u003c\/h3\u003e\n\u003cp\u003eYes — SynShield OTR Plus 5W-40 is formulated for 2007 and newer diesel engines that use heavy EGR and exhaust after-treatment systems. Its low-ash and soot-control chemistry help maintain after-treatment performance while protecting internal components.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCompatible with diesel particulate filters (DPFs) and diesel oxidation catalysts (DOCs).\u003c\/li\u003e\n  \u003cli\u003eFormulated to support engines with selective catalytic reduction (SCR) systems.\u003c\/li\u003e\n  \u003cli\u003eDesigned to meet API CK-4 requirements for modern diesel service.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow does SynShield OTR Plus perform in cold starts and fuel-efficiency goals?\u003c\/h3\u003e\n\u003cp\u003eThe 5W-40 viscosity gives reliable cold weather startability while preserving a fluid film that improves mechanical efficiency at operating temperature. The formulation aims to deliver measurable fuel-economy benefits without sacrificing wear protection.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e5W low-temperature rating ensures easier cranking and faster oil flow at startup.\u003c\/li\u003e\n  \u003cli\u003eFull synthetic base reduces internal friction for improved efficiency.\u003c\/li\u003e\n  \u003cli\u003eBalanced additive package helps maintain fuel economy over service intervals.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat maintenance advantages can a fleet or owner expect from this pack size?\u003c\/h3\u003e\n\u003cp\u003eBuying SynShield OTR Plus in a 12-quart pack simplifies inventory and reduces the frequency of reorder for commercial operations. The individual 1-quart bottles are convenient for topping off reservoirs or servicing small-to-medium equipment without bulk handling.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003ePack of 12 one-quart bottles keeps spares on hand for scheduled service.\u003c\/li\u003e\n  \u003cli\u003eSmaller bottles reduce waste and simplify storage in service bays.\u003c\/li\u003e\n  \u003cli\u003eIndividual bottles are portable for field technicians and mobile service rigs.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for? Schaeffer SynShield OTR Plus 5W-40 is aimed at fleet managers, heavy-equipment operators and diesel owners running 2007-and-newer emission-compliant engines who need a synthetic engine oil that balances cold-start performance, high-temperature durability and soot control. It’s a practical choice for mixed-use fleets, construction equipment, long-haul trucks and any application where API CK-4 performance with after-treatment compatibility is required.\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 OTR Plus 5W-40 compatible with engines using a DPF?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. This full synthetic formulation supports engines with diesel particulate filters and other after-treatment devices while meeting API CK-4 specifications.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can I use this oil in cold climates?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The 5W rating improves cold-start flow and the synthetic base helps protect during low-temperature startups.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Schaeffer Manufacturing Co","offers":[{"title":"Default Title","offer_id":48081520263326,"sku":"B08BW5R3KL","price":255.49,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/schaeffer-synshield-otr-plus-1qt-front-bottle.jpg?v=1785807113","url":"https:\/\/northtrailauto.ca\/products\/schaeffer-manufacturing-co-synshield-otr-plus-5w-40-full-synthetic-diesel-engine-oil-1-quart-bottles-pack-of-12-api-ck-4-dpf","provider":"North Trail Auto","version":"1.0","type":"link"}