Product Overview & Specifications
S-Oil Seven Gold #7 Diesel 10W-40 is a high-performance, semi-synthetic heavy-duty diesel engine oil engineered for optimal protection and efficiency in modern diesel powerplants. Utilizing advanced hydrocracked synthetic base stocks (Group III) blended with a meticulously balanced additive package, this lubricant is designed to meet the rigorous demands of contemporary diesel engines, including those equipped with exhaust after-treatment systems. Its core formulation prioritizes exceptional soot handling, robust wear protection, superior oxidation stability, and controlled sulfated ash, phosphorus, and sulfur (SAPS) levels to safeguard critical components like Diesel Particulate Filters (DPF) and Selective Catalytic Reduction (SCR) systems.
Marketed as a reliable solution for extending drain intervals and reducing operational costs, S-Oil Seven Gold #7 Diesel 10W-40 targets fleet operators, light-duty commercial vehicle owners, and passenger car owners with modern diesel engines that specify a 10W-40 viscosity grade. Its technical prowess ensures consistent performance across a broad range of operating conditions, from cold starts to sustained high-temperature operation under heavy loads, mitigating sludge formation and maintaining engine cleanliness critical for longevity.
Technical Characteristics Table
Here are the key universal technical metrics for this motor oil:
| Parameter | Value / Specification |
|---|---|
| SAE Viscosity Grade | 10W-40 |
| Base Oil Type | Hydrocracked Synthetic (Group III) |
| OEM Approvals & Licenses | MB-Approval 228.31; MAN M 3575; Volvo VDS-4; Renault RLD-3; Cummins CES 20081; Mack EO-O Premium Plus; Detroit Diesel DFS 93K218; Caterpillar ECF-3 |
| ACEA / API Classifications | API CJ-4 / CI-4 Plus / SN (Older Gasoline); ACEA E9 / E7 |
Recommended Applications & Car Compatibility
S-Oil Seven Gold #7 Diesel 10W-40 is specifically formulated for a wide array of modern diesel engines, both naturally aspirated and turbocharged, that require a 10W-40 viscosity and adherence to the listed API and ACEA specifications. Its low SAPS profile makes it particularly suitable for engines equipped with advanced exhaust after-treatment systems, including Diesel Particulate Filters (DPF), Exhaust Gas Recirculation (EGR), and Selective Catalytic Reduction (SCR).
- Light Commercial Vehicles & SUVs: Ideal for European, American, and Asian diesel-powered light commercial vans, pickup trucks, and SUVs from manufacturers like Mercedes-Benz, BMW (diesel variants), Volkswagen, Ford (e.g., Power Stroke requiring 10W-40), Ram (e.g., Cummins requiring 10W-40), Hyundai, and Kia, especially those operating under varied loads and requiring DPF compatibility.
- Heavy-Duty Diesel Engines: Suitable for a range of medium to heavy-duty diesel engines in trucks, buses, and off-highway equipment that specify API CJ-4 or ACEA E9. Its robust film strength and shear stability provide excellent protection under continuous high-load operations.
- Mixed Fleet Operations: The API SN classification, while primarily a diesel oil, provides adequate protection for some older gasoline engines (where SN is specified and a 10W-40 viscosity is appropriate), making it a versatile option for mixed fleets, though its primary focus is diesel.
- Turbocharged Engines: The advanced additive package and synthetic base oils provide superior thermal stability and resistance to oxidation, crucial for protecting turbocharger bearings and reducing deposit formation in hot-running turbo systems.
Operating Conditions & Drain Intervals
- Standard Drain Interval: For light-duty commercial vehicles and passenger diesels under typical highway driving conditions, drain intervals can extend up to 20,000 km (approximately 12,500 miles) or one year, whichever comes first. For heavy-duty applications under moderate service, typical intervals range from 400 to 600 operating hours, contingent on OEM recommendations and oil analysis.
- Severe Service Interval: Under severe operating conditions such as continuous stop-and-go city driving, heavy towing, excessive idling, dusty environments, or extreme temperature fluctuations, the drain interval should be reduced. A prudent severe service interval would be approximately 7,500 to 10,000 km (4,500 to 6,250 miles) or six months, or 250-350 operating hours for heavy-duty engines, supported by regular oil analysis.
- Temperature Performance:
- Cold Start Performance: The 10W designation ensures reliable pumpability and lubrication at temperatures down to approximately -25°C (-13°F), providing rapid oil flow to critical engine components during cold starts, thereby minimizing wear. It is well-suited for temperate and moderately cold climates.
- High-Heat Performance: The 40-grade viscosity at operating temperature provides a robust oil film and maintains excellent shear stability under sustained high engine temperatures, heavy loads, and prolonged high-speed operation. Its enhanced oxidative stability resists thermal breakdown, ensuring consistent protection and reducing sludge formation during hot summer months or demanding work cycles.
Usage Restrictions & Limitations
While S-Oil Seven Gold #7 Diesel 10W-40 is a highly versatile and robust lubricant, certain applications and engine types are not ideally suited for its use:
- Incompatible Viscosity Requirements: This oil must not be used in engines that specifically mandate a different SAE viscosity grade (e.g., 0W-XX, 5W-XX, 15W-40, or 20W-50). Using an incorrect viscosity can lead to inadequate lubrication, increased wear, reduced fuel economy, or compromised engine performance.
- Ultra-Low SAPS Requirements: Although a low SAPS formulation, some highly specialized or newer engines may require an ultra-low SAPS oil (e.g., ACEA C1/C2 or specific OEM custom specifications that are even more restrictive than ACEA E9). Always verify the specific OEM oil specification for compatibility.
- Extreme Cold Climates: While a 10W rating provides adequate cold start protection for most temperate zones, vehicles routinely operating in extremely cold arctic conditions (below -25°C / -13°F) may require a lower W-grade oil (e.g., 0W-XX or 5W-XX) for optimal starting and immediate lubrication.
- Engines Requiring Specific OEM Approvals Not Met: Always cross-reference the required OEM approvals for your specific engine model. If a particular approval is mandated and not listed for S-Oil Seven Gold #7 Diesel 10W-40, an alternative lubricant meeting that specific standard should be chosen.
- Gasoline Engines with Specific API SP/SN Plus Requirements: While this oil carries older gasoline API SN approval, it is primarily a diesel engine oil. Modern gasoline direct injection (GDI) engines often require API SN Plus or SP for protection against Low-Speed Pre-Ignition (LSPI) and timing chain wear. This oil is not formulated with the specific additive chemistry optimized for these very recent gasoline engine demands.
