Weihe CK-4 is a premium heavy-duty diesel engine oil formulated with high-quality Group II/III base stocks and an advanced low-ash additive system. It delivers exceptional soot control, piston cleanliness and oxidation stability for modern low-emission engines fitted with exhaust gas recirculation (EGR) and diesel particulate filters (DPF). The low-sulfated-ash, low-phosphorus, low-sulfur (low-SAPS) formula protects aftertreatment devices and supports extended oil-drain intervals, lowering the total cost of operation for mixed fleets.
Commercial Vehicles
Typical Data
| Item | 15W-40 | 10W-30 |
|---|---|---|
| SAE Viscosity Grade | 15W-40 | 10W-30 |
| Kinematic Viscosity @100°C (mm²/s) | 14.5 | 10.9 |
| Viscosity Index | 140 | 150 |
| Flash Point (COC, °C) | 230 | 224 |
| Pour Point (°C) | -32 | -38 |
| TBN (mg KOH/g) | 9.5 | 9.5 |
| Sulfated Ash (%) | 0.9 | 0.9 |
Characteristics
- Low-SAPS formulation protects DPF/EGR aftertreatment and extends emission-system life.
- Outstanding soot dispersion prevents sludge and maintains oil flow at high soot loads.
- Strong TBN reserve neutralises acids from low-quality fuels, extending drain intervals.
- Excellent antiwear and bearing protection under heavy load and high temperature.
Application Range
- Modern heavy-duty diesel engines with EGR and DPF (Euro V/VI, US EPA 2017).
- Long-haul trucks, buses and mixed fleets requiring extended drain intervals.
- Construction and mining equipment under severe duty cycles.
Base oilSINOPEC · GROUP II–III
CertificationISO 9001 · 14001 · 45001
TraceabilityBATCH-LEVEL
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