{"product_id":"docs-diesel-5w-40-full-synthetic-heavy-duty-diesel-oil-docs5w40-3-3-gallons","title":"Doc's Diesel 5W-40 Full Synthetic Heavy Duty Diesel Oil DOCS5W40-3 | 3-Gallons","description":"\u003ch2\u003eEngineered for modern diesel engines\u003c\/h2\u003e\n\u003cp\u003eDoc's Diesel 5W-40 Full Synthetic Heavy Duty Diesel Oil is designed to perform in severe conditions with premium synthetic base oils and CK-4 additives. It works well in both new emissions-compliant rigs and older engines, helping resist oxidation, maintain consistent viscosity, and support long-lasting durability under heavy use.\u003c\/p\u003e\n\n\u003ch2\u003eKey benefits for your engine\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eExcellent wear protection under high-load operation, reducing metal wear during demanding drives.\u003c\/li\u003e\n  \u003cli\u003eStrong oxidation and thermal stability to minimize deposits in tough environments.\u003c\/li\u003e\n  \u003cli\u003eStay-in-grade viscosity under heat and shear, helping maintain protection during peak workloads.\u003c\/li\u003e\n  \u003cli\u003eFast cold-start protection across all seasons, aiding smoother starts in low temperatures.\u003c\/li\u003e\n  \u003cli\u003eAll-weather performance suitable for on- and off-highway use, including severe service, towing, or dusty conditions.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003ePerformance, compatibility, and fuel considerations\u003c\/h2\u003e\n\u003cp\u003eThe oil is formulated to meet or exceed major specs, including API CJ-4\/CK-4, and carry broad OEM compatibility. It supports 2017 GHG-compliant diesel engines and is designed to help balance emissions considerations with dependable lubrication and potential fuel-economy benefits under varied operating loads.\u003c\/p\u003e\n\n\u003ch2\u003eSpecifications and service guidance\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eMeets or exceeds API CJ-4\/CK-4; backward compatibility with earlier CJ-4 family specifications and multiple OEM approvals.\u003c\/li\u003e\n  \u003cli\u003eReplacement guidelines: For standard service, consider 10,000–15,000 miles; for severe service, 7,500–10,000 miles; for off-road or equipment use, follow manufacturer guidelines (hours may apply).\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eDoc’s brand ecosystem\u003c\/h2\u003e\n\u003cp\u003eDoc’s Diesel oil accompanies a robust lineup of filters and maintenance parts designed to meet or exceed OEM standards. This cohesive approach supports reliable performance and ease of maintenance for fleet or individual use, backed by a Northwest Ohio-based team committed to value and service.\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: What engines is Doc's Diesel 5W-40 suitable for?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Suitable for modern diesel engines with emissions systems and older engines; meets API CJ-4\/CK-4 and supports multiple OEM specs.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: How often should I change the oil with Doc's Diesel 5W-40?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Follow the vehicle maker’s recommended intervals; severe service may shorten the span (roughly 7,500–10,000 miles), normal service up to 15,000 miles.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Doc's Auto Parts","offers":[{"title":"Default Title","offer_id":42397718085717,"sku":"B0FTHSSVHX","price":183.2,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0632\/3270\/4597\/files\/docs-diesel-5w40-full-synthetic-bottle-front.jpg?v=1776061758","url":"https:\/\/plentytorque.co.uk\/products\/docs-diesel-5w-40-full-synthetic-heavy-duty-diesel-oil-docs5w40-3-3-gallons","provider":"PlentyTorque","version":"1.0","type":"link"}