China Longhai CH-4 Heavy-Duty Diesel Oil – Advanced Wear Protection & Engine Cleanliness Exporter, Exporters

Premium Protection for Extreme-Duty Diesel Engines 

Formulated with premium Group III hydrocracked base oils and high-performance imported additives using advanced pulse modulation technology, Longhai API CH-4 Diesel Engine Oil delivers exceptional lubrication performance under the most demanding operating conditions. Specifically engineered for modern heavy-duty diesel engines, this advanced formula provides superior wear protection, soot control, and long-lasting engine cleanliness to ensure optimal performance even in extreme service conditions.

Product Description

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

Heavy-duty truck fleets
Construction and mining equipment
Agricultural machinery
Industrial power generators
Turbocharged diesel engines with EGR systems

Why Choose API CH-4?

Proven Protection

Laboratory tested and field proven in extreme operating conditions.

Cost Effective

Extended drain capability reduces maintenance costs.

Engine Longevity

Keeps engines cleaner for longer service life.

Environmental Compliance

Helps meet emission standards while protecting aftertreatment systems.

Trust API CH-4 Diesel Engine Oil for uncompromising protection and performance in the most demanding applications.

Frequently Asked Questions

QWhat is API CH-4 diesel engine oil?

API CH-4 is a high-performance diesel engine oil specification designed for high-speed, four-stroke engines. It provides excellent wear protection, soot control, and thermal stability, meeting the emissions standards of modern diesel engines.

QCan API CH-4 oil be used in turbocharged engines?

Yes. API CH-4 specifications are specifically engineered to provide enhanced protection for turbocharged engines as well as engines equipped with Exhaust Gas Recirculation (EGR) systems operating under heavy-duty loads.

QHow does API CH-4 engine oil improve engine cleanliness?

It contains advanced detergent and dispersant additives that prevent the accumulation of sludge, varnish, and carbon deposits on pistons, even in high-soot environments, ensuring smooth oil flow and longer engine life.

QDoes this oil help extend oil drain intervals?

Yes. Thanks to its strong TBN (Total Base Number) retention, the oil effectively neutralizes acidic byproducts generated during combustion, allowing for extended change intervals and reduced overall maintenance costs.

QWhat viscosity grades are available for API CH-4 engine oil?

API CH-4 engine oil is commonly available in three major viscosity grades: 15W-40, 10W-30, and 20W-50, designed to provide optimal flow and lubrication performance across a wide range of operating temperatures and environments.

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