Longhai CH-4 Diesel Engine Oil - Premium Protection for Heavy-Duty Diesel Engines | China Factory Suppliers
Key Features & Benefits
✅ Ultimate Wear Protection Under Heavy Loads
- Fortified with extreme-pressure anti-wear additives to minimize friction and protect critical engine components (pistons, bearings, camshafts) during low-speed, high-torque operation
- Ideal for long-haul transportation, construction, and mining equipment that operates under continuous stress
- Specialized additive package maintains protective oil film even under severe pressure conditions
✅ Exceptional Cleanliness & Soot Control
- Advanced detergent and dispersant additives prevent sludge, varnish, and piston deposits even in high-soot environments
- Maintains engine cleanliness for smooth operation and extended engine life
- Superior soot dispersion prevents oil thickening and maintains proper oil flow to critical components
✅ High-Temperature Stability & Oxidation Resistance
- Hydrotreated base oils provide outstanding thermal stability, reducing oil breakdown during prolonged high-speed operation
- Resists viscosity thickening to ensure continuous lubrication under extreme heat conditions
- Advanced antioxidant additives protect against thermal degradation and deposit formation
✅ API CH-4 Certified for Modern Diesel Engines
- Meets API CH-4 specifications for enhanced protection of turbocharged and EGR-equipped engines
- Compatible with low-sulfur diesel fuels to help reduce emissions and protect aftertreatment systems (DPF, SCR)
- Suitable for both older and modern engine designs requiring robust performance
✅ Improved Fuel Efficiency & Extended Drain Intervals
- Optimized viscosity and friction modifiers contribute to better fuel economy
- Strong TBN (Total Base Number) retention neutralizes acidic byproducts, extending oil change intervals
- Reduces maintenance costs while maintaining engine protection
Technical Specifications
| API Classification | CH-4 |
| Viscosity Grades Available | 15W-40, 10W-30, 20W-50 |
| Base Oil Type | Group III Hydrocracked |
| Key Additives | Extreme Pressure Anti-Wear, Detergents, Dispersants, Antioxidants |
Recommended Applications
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Heavy-duty truck fleets
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Construction and mining equipment
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Agricultural machinery
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Industrial power generators
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Turbocharged diesel engines with EGR systems
Why Choose Longhai API CH-4?
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Proven Protection: Laboratory tested and field proven in extreme operating conditions
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Cost Effective: Extended drain capability reduces maintenance costs
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Engine Longevity: Keeps engines cleaner for longer service life
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Environmental Compliance: Helps meet emission standards while protecting aftertreatment systems
Trust Longhai API CH-4 Diesel Engine Oil for uncompromising protection and performance in the most demanding applications.
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Frequently Asked Questions (FAQ)
❓ What does the API CH-4 classification signify?
API CH-4 is a performance standard certified by the American Petroleum Institute. It ensures the engine oil provides robust protection against wear, high-temperature oxidation, and soot-induced viscosity thickening in heavy-duty, high-speed diesel engines.
❓ Which viscosity grades are available for Longhai API CH-4?
To accommodate different operating climates and equipment requirements, Longhai API CH-4 is available in three main viscosity grades: 15W-40, 10W-30, and 20W-50.
❓ Is this oil suitable for equipment operating under heavy loads?
Yes, it is formulated with extreme-pressure anti-wear additives that protect critical engine components like pistons, bearings, and camshafts during continuous high-stress operations in mining, construction, and agriculture.
❓ How does this engine oil control soot and maintain engine cleanliness?
It features advanced detergent and dispersant additives that prevent the formation of sludge, varnish, and piston deposits. This keeps the soot suspended in the oil, avoiding oil thickening and maintaining a smooth oil flow.
❓ Can Longhai API CH-4 help extend oil drain intervals?
Yes. Thanks to its strong Total Base Number (TBN) retention, the oil effectively neutralizes acidic combustion byproducts over time. This helps protect the engine longer and allows for extended oil change intervals, reducing overall maintenance costs.