China Longhai CJ-4 Synthetic Diesel Oil - Premium Performance from Trusted Suppliers & Factory for Modern Engines
Key Benefits & Features
✅ Ultimate Engine Protection
- Synthetic technology ensures superior oil film strength, minimizing metal-to-metal contact and preventing wear under extreme operating conditions
- Advanced anti-wear additives provide critical component protection (turbochargers, pistons, bearings) even under heavy loads
- Specialized friction modifiers reduce energy loss while maintaining protective oil film integrity
✅ Advanced High-Temperature Performance
- Exceptional thermal and oxidation stability prevents oil breakdown in high-heat environments
- Powerful detergency controls deposits and soot accumulation to maintain engine cleanliness
- Resists viscosity breakdown in turbocharged applications, ensuring continuous protection
✅ All-Climate Performance
- Superior cold-flow properties enable quick cold starts and instant lubrication in freezing conditions
- Maintains stable viscosity across wide temperature ranges for consistent protection
- Excellent pour point characteristics for reliable operation in arctic conditions
✅ Meets Stringent Industry Standards
- Fully compliant with API CJ-4 and ACEA E7-12 specifications
- Compatible with DPFs (Diesel Particulate Filters) and other aftertreatment systems to help reduce emissions
- Low SAPS (Sulfated Ash, Phosphorus, Sulfur) formulation protects emission control systems
✅ Extended Drain Capability
- Enhanced TBN (Total Base Number) retention effectively neutralizes acids for extended service life
- Reduces maintenance costs while maintaining peak engine performance
- Advanced additive package resists depletion for longer-lasting protection
Technical Specifications
| Base Oil | Premium Synthetic (Group III/IV) |
| Additive Package | Afton Technology |
| Available Viscosity | 15W-40, 10W-30 |
| API Classification | CJ-4 |
| ACEA Specifications | E7-12 |
| OEM Approvals | Meets major manufacturer requirements |
Recommended Applications
- ✔ Modern diesel engines with exhaust aftertreatment systems
- ✔ Heavy-duty trucks and commercial fleets
- ✔ High-performance turbocharged engines
- ✔ Construction and mining equipment
- ✔ Long-haul transportation vehicles
Why Choose Longhai API CJ-4 Synthetic?
Proven Performance
Extensive laboratory and field testing validates superior protection
Cost Efficiency
Extended drain intervals reduce total cost of ownership
Engine Longevity
Keeps critical components cleaner for longer service life
Environmental Compliance
Helps meet Euro VI/EPA 2010 emissions standards
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Frequently Asked Questions (FAQ)
What are the primary benefits of using API CJ-4 synthetic engine oil?
API CJ-4 synthetic engine oil provides outstanding protection against wear, excellent high-temperature stability, superior soot handling, and robust protection for emission control systems like DPFs (Diesel Particulate Filters).
Is Longhai API CJ-4 oil compatible with older diesel engines?
Yes, API CJ-4 is backward compatible with older API service categories such as CI-4 and CH-4, making it suitable for both modern and legacy heavy-duty diesel engines.
What viscosity grades are available for Longhai API CJ-4 Synthetic oil?
Longhai API CJ-4 Synthetic engine oil is available in 15W-40 and 10W-30 viscosity grades, covering a wide range of operating temperatures and climate conditions.
How does this oil help extend drain intervals?
Thanks to its high-quality Group III/IV synthetic base oils and advanced Afton additive package, it maintains excellent TBN (Total Base Number) retention to neutralize acids longer, resisting viscosity breakdown and additive depletion.
Does this formulation support environmental emission standards?
Yes, it features a Low SAPS (Sulfated Ash, Phosphorus, and Sulfur) formulation that helps protect exhaust aftertreatment systems, ensuring compliance with Euro VI and EPA 2010 emission standards.