Weisheng CI-4 is a robust heavy-duty diesel engine oil developed for EGR-equipped engines operating under severe conditions. It delivers superior control of soot-induced viscosity increase and outstanding protection against wear, corrosion and deposits. The formulation maintains engine cleanliness and oil pumpability in cold starts, making it suitable for both on-highway fleets and harsh off-road duty.
Commercial Vehicles
Typical Data
| Item | 15W-40 | 20W-50 |
|---|---|---|
| SAE Viscosity Grade | 15W-40 | 20W-50 |
| Kinematic Viscosity @100°C (mm²/s) | 14.8 | 19.5 |
| Viscosity Index | 135 | 125 |
| Flash Point (COC, °C) | 230 | 235 |
| Pour Point (°C) | -30 | -26 |
| TBN (mg KOH/g) | 10.5 | 11.0 |
| Sulfated Ash (%) | 1.3 | 1.4 |
Characteristics
- Excellent soot handling limits viscosity thickening.
- High-temperature deposit control for pistons and turbochargers.
- Reliable cold-start pumpability.
- Antiwear protection for rings, liners and bearings.
Application Range
- EGR-equipped heavy-duty trucks and buses.
- Construction, mining and agricultural machinery.
- Industrial diesel engines and power generation.
Base oilSINOPEC · GROUP II–III
CertificationISO 9001 · 14001 · 45001
TraceabilityBATCH-LEVEL
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