Product Introduction

Our CK-4 5W-40 Commercial Vehicle Diesel Engine Oil is a premium full-synthetic lubricant built for all heavy-duty diesel engines in commercial vehicles.

It meets and exceeds the strict API CK-4 standard, with perfect backward compatibility for older engines that used CJ-4, CI-4 plus and earlier oil grades.

This oil works great in all climate conditions, from cold winter starts to high-temperature heavy-load running, delivering steady lubrication and all-round protection for your commercial vehicle engines, cutting down maintenance costs and boosting vehicle uptime.

Technical Parameters

Parameter	Specification	Test Method
Viscosity Grade	SAE 5W-40	SAE J300
API Classification	CK-4	API 1509
Kinematic Viscosity (40°C)	12~14 mm²/s	GB/T 265
Flash Point (Open Cup)	≥ 225°C	GB/T 3536
Pour Point	≤ -35°C	GB/T 3535
Total Base Number (TBN)	10~12 mgKOH/g	GB/T 4945
Ash Content (wt%)	≤ 0.4	ASTM D874
Oxidation Stability (1000h, 120°C)	Acid Number ≤ 1.5 mgKOH/g	GB/T 12581

Product Advantages

1. Superb wear resistance that shields engine parts from damage under high pressure and heavy loads.
2. Low ash formula protects DPF and SCR after-treatment systems, reducing clogging and extending their service life.
3. Excellent high-temperature stability, no easy oil breakdown or viscosity loss even in extreme working conditions.
4. Better fuel economy compared to conventional 15W-40 oils, saving daily operating costs for fleets.
5. Strong detergency and dispersancy, keeping the engine interior clean and reducing sludge and deposits.

Craft & Technology

Formulated with ultra-pure full-synthetic base oils and a scientifically balanced high-performance additive package. Adopts advanced anti-oxidation and anti-wear technology to enhance oil film strength and oxidation resistance. The low-ash additive formula is precisely calibrated to meet emission standards, and the viscosity control technology ensures smooth cold starts and stable high-temperature performance, fully matching the working characteristics of modern commercial vehicle diesel engines.

Application Fields

Suitable for on-highway commercial vehicles like heavy-duty trucks, large buses and container trucks; off-highway equipment including construction machinery, mining vehicles and agricultural tractors; also for stationary diesel generator sets and marine low-speed diesel engines that require API CK-4 5W-40 grade oil. It's ideal for mixed fleets with different engine types, realizing one oil for multiple uses and simplifying fleet oil management.

Services

1. Professional technical support for oil selection and usage guidance.
2. Customized packaging solutions for different order quantities.
3. Fast global delivery with stable supply chain and on-time shipping.
4. Free product data sheet and after-sales follow-up service.

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