{"product_id":"schaeffer-manufacturing-co-synshield-otr-plus-5w-40-full-synthetic-diesel-oil-1-gal-x6-api-ck-4-dpf-safe","title":"Schaeffer Manufacturing Co SynShield OTR Plus 5W-40 Full Synthetic Diesel Oil, 1 gal x6, API CK-4, DPF-Safe","description":"\u003cstrong\u003eSchaeffer SynShield OTR Plus 5W-40 is a full synthetic heavy-duty diesel engine oil engineered to protect modern diesel engines while supporting fuel efficiency.\u003c\/strong\u003e\n\n\u003cp\u003eThis advanced synthetic-plus formulation combines thermal stability, detergent action, and proprietary friction modifiers to help control wear, soot, and deposits in contemporary diesel powerplants. It meets API CK-4 performance guidelines and is designed for use in 2007–2010 emission-compliant engines that rely on heavy EGR and after-treatment systems such as DPFs, DOCs, and SCR units. Packaged as 1-gallon bottles sold in a pack of six, this oil targets commercial and industrial users who need dependable lubrication under demanding conditions.\u003c\/p\u003e\n\n\u003ch3\u003eHow does this 5W-40 oil protect engines under heavy-duty use?\u003c\/h3\u003e\n\u003cp\u003eSchaeffer’s SynShield OTR Plus uses a blend of antioxidants, detergents, and shear-resistant base stocks to maintain film strength at high operating temperatures. The formula minimizes metal-to-metal contact and resists viscosity breakdown so moving parts remain protected during long runs and heavy loads.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eFull synthetic base stocks for thermal and oxidative stability\u003c\/li\u003e\n  \u003cli\u003eFriction modifiers (Micron Moly and Penetro) to reduce wear\u003c\/li\u003e\n  \u003cli\u003eHigh-temperature oil strength that resists thinning\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill this oil work with exhaust after-treatment systems like DPFs and SCR?\u003c\/h3\u003e\n\u003cp\u003eYes—SynShield OTR Plus 5W-40 is formulated for engines with EGR and common after-treatment devices. It balances soot control with dispersancy to help keep filters and catalysts functioning as intended without contributing excessive ash or deposits.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCompatible with diesel particulate filters (DPFs) and diesel oxidation catalysts (DOCs)\u003c\/li\u003e\n  \u003cli\u003eDesigned for engines using selective catalytic reduction (SCR)\u003c\/li\u003e\n  \u003cli\u003eGood soot-handling and deposit-dispersing properties\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow does this oil perform in cold starts and fuel-efficiency terms?\u003c\/h3\u003e\n\u003cp\u003eThe 5W cold-grade rating gives improved flow at low temperatures for easier starts and faster oil circulation, while the friction modifiers and low-wear chemistry support smoother operation that can help maintain fuel economy. This balance helps equipment start reliably in cold conditions without sacrificing in-service durability.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eSuperior cold startability for quicker oil flow on startup\u003c\/li\u003e\n  \u003cli\u003eFriction reduction for smoother operation and sustained fuel economy\u003c\/li\u003e\n  \u003cli\u003eKeep-clean additives that minimize deposits that can reduce efficiency\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat service specs and equipment is this oil intended for?\u003c\/h3\u003e\n\u003cp\u003eSynShield OTR Plus meets API CK-4 performance levels and is appropriate for a wide range of heavy-duty diesel engines built to newer emissions standards. It’s suitable for fleets and individual equipment owners running on-road or off-road diesel engines requiring CK-4 lubrication.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eMeets API CK-4 specification for modern diesel engines\u003c\/li\u003e\n  \u003cli\u003eRecommended for 2007–2010 emission-compliant engines and newer\u003c\/li\u003e\n  \u003cli\u003eAppropriate for on-highway and off-highway heavy-duty applications\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 technicians who demand a high-performance full synthetic diesel oil that balances protection, deposit control, and fuel economy. It’s a practical choice for vehicles and machines that operate in varied climates, face heavy soot loads from EGR systems, and require oil that supports modern after-treatment systems. Choose the pack-of-six 1-gallon set for convenient stocking and regular service intervals in garages, service trucks, and maintenance shops.\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 Schaeffer SynShield OTR Plus 5W-40 compatible with DPF-equipped engines?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes — formulated for engines with DPFs, DOCs, and SCR systems while managing soot and deposits.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Does this oil meet modern diesel specifications?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: It meets API CK-4 performance levels suitable for many 2007 and newer diesel engines.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Schaeffer Manufacturing Co","offers":[{"title":"Default Title","offer_id":48082820989086,"sku":"B08BW31293","price":470.42,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/schaeffer-synshield-otr-plus-front-bottle.jpg?v=1785815437","url":"https:\/\/northtrailauto.ca\/products\/schaeffer-manufacturing-co-synshield-otr-plus-5w-40-full-synthetic-diesel-oil-1-gal-x6-api-ck-4-dpf-safe","provider":"North Trail Auto","version":"1.0","type":"link"}