Mobil Jet II Oil Turbine Engine - MIL-PRF-23699

Mobil Jet Oil II is a high performance aircraft-type gas turbine lubricant formulated with a combination of a highly stable synthetic base fluid and a unique chemical additive package. The combination provides outstanding thermal and oxidative stability to resist deterioration and deposit formation in both the liquid and vapour phases, as well as excellent resistance to foaming. The effective operating range of Mobil Jet Oil II is between -40°C (-40 °F) and 204 °C (400°F).

Mobil Jet Oil II is engineered for aircraft gas turbine engines used in commercial and military service requiring MIL-PRF-23699 level performance. It also is recommended for aircraft-type gas turbine engines in industrial or marine service applications.

Mobil Jet Oil II has the following builder approvals

Engines

Honeywell/Lycoming-Turbine engines

Rolls-Royce/Allison Engine Company

CFM International

General Electric Company

IAE International

Pratt and Whitney Group

SNECMA

Pratt and Whitney, Canada

Rolls-Royce Limited

Honeywell/Garrett-Turbine Engine Company

Turbomeca

Accessories

Honeywell-Auxiliary power units and air cycle machines

Hamilton Standard-Starters

Hamilton Sundstrand corp.- APUs, Constant-speed drives and integrated-drive generators

Mobil Jet Oil II is recommended for aircraft gas turbine engines of the turbo-jet, turbo-fan, turbo-prop, and turbo-shaft (helicopter) types in commercial and military service. It is also recommended for aircraft-type gas turbine engines used in industrial or marine applications. Mobil Jet Oil II is approved against U.S. Military Specification MIL-PRF-23699. It is also compatible with other synthetic gas turbine lubricants meeting MIL-PRF-23699. However, mixing with other products is not recommended because the blend would result in some loss of the performance characteristics of Mobil Jet Oil II. Mobil Jet Oil II is compatible with all metals used in gas turbine construction, as well as with F Rubber (Viton A), H Rubber (Buna N), and silicone seal materials.

Mobil Jet Oil II is formulated to meet the demanding requirements of aircraft-type gas turbines operating over a wide range of severe operating conditions. The product has a high specific heat in order to ensure good heat transfer from oil-cooled engine parts. In extensive laboratory testing and in-flight performance, Mobil Jet Oil II exhibits excellent bulk oil stability at temperatures up to 204°C (400 °F). The evaporation rate at these temperatures is low enough to prevent excessive loss of volume. Key features and benefits include:

Excellent thermal and oxidation stability: Reduces the formation of carbon and sludge deposits Maintains engine efficiency and extends engine life

Excellent wear and corrosion protection: Extends gear and bearing life Reduces engine maintenance

Retains viscosity and film strength across wide temperature range: Provides effective lubrication at high operating temperatures

Chemically stable: Reduces evaporation losses and lowers oil consumption

Low pour point: Eases start-up in low ambient temperature conditions