1. Product Features

• Thermal & Oxidative Stability
  Mobil Jet Oil II maintains stability under high temperatures (up to 204°C/400°F) and pressures, minimizing carbon deposits and sludge formation to sustain engine efficiency and longevity. Some sources note thermal stability at 285°C, though this may pertain to specific test conditions.

• Low-Temperature Performance
  With a pour point of -59°C, it ensures smooth engine starts even at -40°C.

• Wear & Corrosion Protection
  A specialized additive package provides superior protection for gears and bearings, reducing wear and corrosion.

• Chemical Stability & Low Evaporation Loss
  Low evaporation rates reduce oil consumption, ideal for prolonged high-load operations.

• Compatibility
  Meets U.S. military standard MIL-PRF-23699-STD and is compatible with oils under the same standard, though mixing may compromise performance.

2. Applications

• Engine Types
  Suitable for turbojet, turbofan, turboprop, and turboshaft (helicopter) engines, as well as auxiliary power units (APUs) and integrated drive generators (IDGs). Certified for use in Boeing, Airbus, Bombardier, and other aircraft models.

• Industrial & Marine Use
  Applicable to gas turbines in industrial or marine settings with operational similarities to aviation engines.

• Manufacturer Approvals
  Approved by major engine manufacturers, including Honeywell, Rolls-Royce, Pratt & Whitney, and General Electric.

3. Economic & Maintenance Benefits

• Reduced Maintenance Costs
  Controls deposits and keeps oil pathways clean, lowering maintenance frequency. For example, WestJet Airlines reported a significant drop in IDG failures after switching to this oil.

• Extended Component Lifespan
  Lab tests and field data demonstrate reduced gear and bearing wear, prolonging replacement intervals.

• Global Validation
  Used in over 11,000 gas turbine engines across 160 major airlines worldwide.

4. Technical Specifications

• Viscosity: 5.1 mm²/s at 100°C, 27.6 mm²/s at 40°C.

• Flash Point: 270°C (Cleveland Open Cup).

• Pour Point: -59°C, ensuring cold-start reliability.

• Packaging: Available in quarts (~946ml), cases (24 quarts), and cost-effective 55-gallon drums.

5. Safety & Controversies

• TCP Additive Debate
  Contains ~3% tricresyl phosphate (TCP) for enhanced lubrication. While an Australian Parliament report flagged potential exposure risks, ExxonMobil asserts its low toxicity and lack of proven harm to humans.

• Certifications & Monitoring
  Complies with international safety standards, with detailed health guidelines in its Material Safety Data Sheet (MSDS).

Summary

Mobil Jet Oil II is a trusted aviation lubricant renowned for its thermal stability, wear resistance, and broad applicability. Its economic benefits stem from reduced maintenance costs and extended engine life. While TCP safety discussions persist, the product remains widely adopted. Users should adhere to manufacturer guidelines and avoid mixing oils to optimize performance.