Description
This product medium speed trunk piston engine oil packages are formulated with high-quality detergent, dispersant, ZDDP and other additive components. T9312 serves as core agent, Medium-speed Trunk Piston Engine Oil Additive Package serves as high performance TBN booster, and the medium speed trunk piston engine oil combined formulation of both provides excellent acid neutralization, detergency, dispersancy, anti-oxidant, anti-wear and water separation performance. Blending with Group I and II base oils and with the combination of T9312 and Medium-speed Trunk Piston Engine Oil Additive Package is able to formulate Medium-speed trunk piston engine oil, meeting GB/T38049-2019 specification with TBN ranges from 12-50mgKOH/g and viscosity covers SAE30 and SAE40.
| TBN Level | 12 | 15 | 20 | 30 | 40 | 50 |
| T9312,% | 5.5 | 5.5 | 5.5 | 5.5 | 5.5 | 5.5 |
| T9312B,% | 2.2 | 3.2 | 4.9 | 8.2 | 11.5 | 14.8 |
| Item | T9312 | T9312B | Test Method |
| Density (20℃),kg/m³ | 963-1003 | 1075-1115 | SH/T0604,ASTM D4052 |
| Kinematic Viscosity(100℃),mm²/s | Report | Report | GB/T265,ASTM D445 |
| Flash Point (COC),℃ | ≥180 | ≥180 | GB/T3536,ASTM D92 |
| TBN,mg KOH/g | Report | Report | SH/T0251,ASTM D2896 |
| Ca,m% | 3.04-3.72 | 10.47-12.81 | GB/T17476,ASTMD5185 |
| Zn,m% | 1.35-1.67 | —- | GB/T17476,ASTM D5185 |
| P,m% | 1.14-1.40 | —- | GB/T17476,ASTM D5185 |
| N,m% | 0.50-0.80 | —- | NB/SH/T0704,ASTM D5762 |
| S,m% | Report | Report | GB/T17476,ASTM D5185 |
| Sulfated Ash,m% | Report | Report | GB/T2433,ASTM D874 |
Shanghai Minglan Chemical Co., Ltd. is a high-tech enterprise focusing on the research, development, production and sales of lubricant additives. The company is committed to providing high-performance additive solutions for a variety of lubricating products such as engine oil, gear oil, hydraulic oil, metalworking fluid, grease, etc., helping customers improve the quality of lubricants and market competitiveness.
🏭 Factory Strength
🔹 Advanced production equipment: modern factory, strictly implement international quality management system
🔹 Efficient supply chain: ensure stable product supply to meet global market demand
🔹 Green and environmentally friendly process: meet environmental standards and promote sustainable development

🔬 R&D and innovation
🔹 Professional laboratory: equipped with advanced analytical instruments to ensure product performance
🔹 Technical team: composed of senior experts in the industry, constantly optimizing the formula
🔹 Customized service: meet different market needs and provide personalized solutions

🌍 Global market layout
📍 Covered areas: Russia, Middle East, Europe, America, Africa, Southeast Asia, etc.
📍 Industry applications: automobiles, heavy machinery, industrial equipment and other fields
📩 Looking forward to working with you to create a new future for lubrication!
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In medium-speed, trunk-piston engines, maintaining optimal lubrication is crucial for efficient operation, minimizing wear and tear, and extending engine life. Base oils alone might not provide sufficient protection under various operating conditions. This is where medium-speed trunk piston engine oil additive packages come into play.
A medium-speed trunk piston engine oil additive package is specifically formulated to enhance the performance and protection of medium-speed trunk piston engines used in marine, power generation, and industrial applications. These engines operate at moderate speeds and typically run on heavy fuel oils, requiring robust lubrication solutions to combat wear, deposits, corrosion, and oxidation. The additive package is designed to meet the unique challenges associated with these engines, ensuring optimal performance, reliability, and longevity.
Here’s a breakdown of these concentrated additive packages and their role in enhancing engine oil performance:
Components and Functions:
- Detergents and Dispersants: These additives help maintain engine cleanliness by:
- Detergency: Detergents remove contaminants like sludge, varnish, and soot deposits from engine surfaces, preventing them from accumulating and hindering lubrication.
- Dispersancy: Dispersants keep these contaminants suspended in the oil, preventing them from settling out and potentially causing wear.
- Antioxidants: Engine operation generates heat that can degrade the base oil over time. Antioxidants help mitigate this by scavenging free radicals, which are molecules that contribute to oil oxidation and thickening. This maintains the oil’s viscosity and performance at optimal levels.
- Antiwear Additives: These additives form a protective film on metal surfaces, reducing friction and wear between contacting parts like pistons, rings, and bearings. Examples include anti-scuffing and anti-seize agents.
- Corrosion Inhibitors: They protect metal components from corrosion caused by acidic byproducts generated during combustion or through contamination with water.
- Friction Modifiers: Certain additives can help reduce friction between moving parts, potentially improving fuel efficiency. However, these need to be carefully balanced to ensure adequate lubrication.
- Viscosity Modifiers (VM): These additives help maintain the oil’s viscosity across a wider temperature range. This ensures adequate lubrication during cold starts when the oil is thicker and at high operating temperatures when the oil tends to thin out.
- Total Base Number (TBN) Boosters: Some additives can increase the TBN of the oil. TBN is a measure of the oil’s ability to neutralize acidic byproducts from combustion. Maintaining adequate TBN is crucial for protecting against corrosion and wear caused by these acids.
Benefits of Using Medium-Speed Trunk Piston Engine Oil Additive Packages:
- Enhanced Engine Protection: The combination of additives provides superior protection against wear, corrosion, and sludge formation, extending engine life.
- Improved Performance: Effective lubrication reduces friction, potentially leading to improved fuel efficiency and overall engine performance.
- Extended Oil Drain Intervals: With enhanced oil performance, drain intervals between oil changes can potentially be extended according to the manufacturer’s recommendations.
- Cleaner Engines: Detergents and dispersants promote cleaner engines by preventing deposit formation, contributing to better overall engine health.
Important Considerations:
- Compatibility with Base Oil: Ensure the additive package is compatible with the base oil you are using in your engine. Incompatible combinations can lead to performance issues or precipitation of additive components within the oil.
- Oil Analysis: Regular oil analysis can help monitor the oil’s condition and effectiveness of the additive package. Based on the analysis results, oil changes or additive top-up might be necessary.
- Operating Conditions: Proper selection and formulation of the additive package are crucial to meet the specific requirements and operating conditions of medium-speed trunk piston engines, including load, speed, temperature, and fuel quality.









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