Overview

YIDUN API CK-4 diesel engine oil is developed and manufactured by Baoding Muhai Lubricating Oil Import & Export Co., Ltd. Formulated with premium fully synthetic base stocks and new-generation heavy-duty additive technology. It surpasses CJ-4 performance, specially designed for China Ⅴ & China Ⅵ diesel engines equipped with after-treatment systems (DPF particulate filter, SCR urea system). Meets long oil drain requirements for modern heavy trucks and construction machinery. Delivers outstanding wear resistance, oxidation stability and soot control. Protects DPF and prevents filter clogging. Backward compatible with CI-4/CH-4/CF-4 engines. Portable 4L jug suitable for auto parts retail, small fleet service and overseas end-user procurement.

Key Features

✅ Long-Term Wear Protection for Stable Heavy-Duty OperationNew-generation anti-wear formula creates tough lubricating film on pistons, cylinder liners and crankshafts. Reduces component wear during long-haul transport and heavy-duty site operation to extend engine service life.

✅ Low Ash Formula to Protect DPF Particulate FilterLow sulfated ash formulation cuts particulate residue, safeguards China Ⅵ after-treatment systems, lowers DPF clogging risk and reduces expensive after-treatment repair cost.

✅ Superior Oxidation Resistance for Extended Oil Drain IntervalExcellent thermal stability and antioxidation performance. Resists thickening and aging under high temperature for long-distance driving, supports long mileage oil change and cuts downtime maintenance.

✅ High-Efficiency Soot Dispersancy & Sludge PreventionPowerful soot dispersion prevents soot agglomeration, sludge and varnish buildup, keeps engine internals clean and maintains stable power output.

✅ Balanced Base Reserve & Anti-Corrosion, Compatible with Low-Sulfur FuelWell-tailored base number neutralizes acidic combustion by-products, protects bearings and cylinder liners. Matches China V & VI low-sulfur diesel fuel and also compatible with certain high-sulfur diesel.

✅ 4L Jug with Ergonomic Handle, Easy Filling & TransportNon-slip ergonomic handle for simple pouring and convenient storage & shipping. Ideal for auto retail shops, agricultural machinery and on-site maintenance orders.

Viscosity / Specifications

5W-30, 5W-40, 10W-40, 15W-40

Application

China Ⅴ & China Ⅵ heavy-duty diesel engines with DPF/SCR after-treatment systems: heavy trucks, long-distance coaches, excavators, wheel loaders, tractors, diesel generator sets, mining machinery. Backward compatible with CI-4, CH-4, CF-4 engines.