I. Product Positioning & Technological Evolution

Teli 20 Aviation Lubricating Oil, developed by Shenyang Teli Petrochemical Co., Ltd., is a high-performance synthetic hydrocarbon aviation lubricant designed for piston aircraft engines and compatible with turboprop engine blending. Its development spans three phases:

1. Imitation Phase (1950s): Based on Soviet MC-20 technology, using Daqing/Yumen petroleum base oil with a pour point of -20°C and kinematic viscosity of 20 mm²/s (100°C), meeting early piston engine needs.

2. Improvement Phase (1980s–2000s): Two upgrades introduced synthetic hydrocarbon base oil, enhancing low-temperature performance (pour point reduced to -30~-35°C) and oxidation stability, forming dual "petroleum + synthetic" product lines.

3. Full-Synthetic Phase (2020s): Adopts soft wax-cracked polyolefin synthetic formula, compliant with Chinese standards (GB 440-1977/GJB 1219-1991) and U.S. MIL-L-6082D, breaking military market barriers.

II. Key Performance & Technical Parameters

1. Base Oil & Additives

• Base Oil: Deep-refined low-pour mineral oil + synthetic hydrocarbons (soft wax-cracked polyolefins), dewaxing precision ±1°C, NAS Class 6 cleanliness.

• Additives:

• 264-type antioxidants: Acid value change rate ≤0.05 mgKOH/g/year, extending service life by 30%.

• Ashless dispersants: Carbon residue ≤0.3%, reducing piston carbon deposits.

2. Critical Performance Metrics

3. Unique Advantages

• Ultra-low-temperature adaptability: Pour point down to -35°C, supporting -50°C cold starts (e.g., Xinjiang’s Korla oilfield equipment).

• High-temperature stability: Flash point up to 270°C, evaporation loss ≤20% (71°C/6h), outperforming petroleum-based products.

• Cleanliness: Zero mechanical impurities, moisture ≤36 ppm, compliant with AS4059 Class 6, suitable for precision servo systems.

III. Applications & Case Studies

1. Aviation Sector

• Military:

• PLA Air Force trainer aircraft (e.g., HH-20B), J-11 series aircraft (blended with Type 928 oil).

• Civil:

• Piston engine lubrication (cylinders, crankshafts), ground equipment in polar-region airports.

2. Industrial Applications

• Polar expeditions: Hydraulic machinery at Antarctic Kunlun Station (-50°C operation).

• Oilfield equipment: Double-acting hydraulic pumps (12% reduction in gas leakage).

• High-pressure machinery: Dump truck transmissions, fire truck telescopic arms (friction coefficient reduced to 0.32).

IV. Competitive Analysis

V. R&D & Production

1. Collaborations:

• Joint development with Aero Engine Engineering Technology Research Center on titanium alloy wear resistance.

• Molecular distillation (SWRI, USA) ensures 99.7% base oil purity.

2. Production:

• Nitrogen-protected filling process (NAS Class 6 cleanliness).

• ISO 9001 certified with ≥5-year batch traceability.

VI. Market Strategy

• Military: Strategic partnership with PLAAF since 2020, annual supply >200 tons, replacing imported MC-20.

• Civil markets: 35% share in polar-region machinery (2024 data); exports to Russia’s Yakutsk oilfields.

• Competitive edge: One of China’s only two private products certified to MIL-L-6082D, challenging foreign monopolies.

VII. Usage Guidelines

1. Compatibility:

• Do not mix with mineral oils (e.g., Type 8A jet oil) to avoid filter clogging.

• Avoid fluorinated rubber (swelling >50%); use NBR seals.

2. Handling:

• Precision filtration (≤10μm) during refilling; use opened containers within 72 hours.

• Storage: ≤30°C, humidity ≤60%, away from light and dust.

3. Maintenance:

• Test acid value/viscosity every 6 months; monitor moisture monthly.

• Replace if acid value >0.25 mgKOH/g or viscosity change >15%.

Summary & Recommendations

Teli 20 excels in full-synthetic technology, wide temperature adaptability, and military-civilian compatibility, making it a benchmark product for aviation and industrial lubrication:

• Preferred scenarios:

1. Ultra-low-temperature environments (<-40°C) or high-precision systems.

2. Cost-sensitive civil-military projects.

3. Long-term high-temperature operations (e.g., turboprop engine blends).

• Cautions:

1. Mandatory state-brand military procurement requires Kunlun 20.

2. For >150°C applications, switch to Teli 4050 high-temperature oil.