Extending on Wing Life: How Greenwood Aerospace Supports Durable Oil Solutions
One of the most prolific items that we sell is aircraft engine oil. It's no surprise that the U.S. military has a fleet of approximately 10,000 aircraft; non-military federal agencies also operate hundreds of aircraft. Turbine engines require regular checks and servicing after every flight, which involves a significant amount of oil. Eastman 2380 Turbo Engine Oil is one of the best-selling products on the market.
Let’s take a few minutes to talk about how this oil extends on-wing life for the engines in your fleet!
What You Need to Know About MIL-PRF-23699 Turbine Engine Oils
Eastman Turbo Oil 2380 is a widely used engine oil for gas turbine engines, mainly those used in aircraft. Classified as a 5 sCt synthetic oil, it is approved and complies with both MIL-PRF-23699 and U.K DEF STAN 91-101/2. These certifications provide immediate credibility for the manufacturer and indicate to military operators that the lubricant meets easily identifiable, verifiable specifications.
The role that turbine oils play in military aviation is absolutely critical. High-performance turbine oil is the single most crucial component to extend the service life of a turbine engine. Maintenance teams rely on high-performance oils to protect moving components, minimize sludge and varnish buildup, and keep engines operating at peak efficiency.
Inadequate or inferior lubricants will lead to a reduced service life, increase maintenance and service costs, and increase the incidence of catastrophic failures. Approved and recommended by major manufacturers, including Rolls-Royce, GE, Pratt & Whitney, Honeywell, and Eastman 2380, this lubricant is trusted as an OEM lubricant due to its combination of thermal stability, oxidation resistance, and low-temperature performance, making it well-suited for both commercial and military operations.
Properties and Performance
Turbine engine oils have to perform under extreme conditions every single flight, because flying is, by nature, an extreme activity. All aircraft engines, regardless of size or application, operate at significantly higher power settings than those of marine or road vehicles. Reciprocating engines, such as those with Lycoming pistons, typically operate at 75% to 100% of their power setting during flight. In contrast, an automobile engine typically operates at around 15%-20% of its peak capacity.
Aircraft engines undertake a serious task, and the first line of defense is our turbine engine oils. Varnish and sludge deposits will take their toll on engine components, so the right oil is critical for highly loaded lubricated surfaces. Environmental conditions play a significant role in the reliability and longevity of turbine engines, as aircraft often operate in diverse environments and sometimes on the same day. Think about a jet taking off from Miami and landing in Minneapolis in January.
Eastman 2380 has superior low-temperature viscosity properties. Among all 5 cSt turbine oils, Eastman Turbo Oil 2380 is regarded as the benchmark for cold-weather performance. This ensures rapid lubrication during startup in cold conditions, preventing metal-to-metal contact that could otherwise reduce engine life.
But cold-weather prowess is not the only key feature in this equation. Eastman 2380 also offers:
- Oxidation stability that prevents sludge formation.
- Load-carrying capacity to protect heavily stressed engine parts.
- Corrosion resistance to defend against the degradation of metals.
- Copper passivation neutralizes the catalytic effects of copper alloys and reduces oxidation rates.
Meeting Military Specifications
Eastman 2380 meets MIL-PRF-23699 standards.
MIL-PRF-23699 is the benchmark turbine engine oil specification used in many military aircraft engines, including the KC-135R, F-15, F-16, and F-35. MIL-PRF-23699F is the military’s gold standard for turbine engine oils, and its influence extends well beyond defense aviation into commercial fleets worldwide.
This spec guarantees that turbine oils meeting the spec deliver reliable lubrication in the most demanding environments, from freezing startups at -40°C to continuous operation in the hundreds of degrees, taking off in Montreal and landing in Cozumel. It defines three categories of oil: Standard (STD) for general use, Corrosion Inhibiting (C/I) for engines exposed to moisture during downtime, and High Thermal Stability (HTS) for hotter-running engines where coking and oil breakdown are a concern.
For operators, the benefit is simple: when an oil meets MIL-PRF-23699F, it has been tested against strict benchmarks for wear protection, corrosion resistance, and deposit control. For the full breakdown on what MIL-PRF-23699 entails, check out the full MIL-PRF here.
Compatibility with Seal Materials
One fundamental challenge with turbine lubricants is their compatibility with seal materials. Mismatched oils will eventually cause seals to degrade and even fail prematurely. Eastman 2380 has been tested for compatibility with most seals and is benign to standard elastomers and commonly used seal materials.
Oxidation Resistance and Bulk Stability
Oxidation resistance enables engines to run more efficiently throughout their power bands while maintaining a clean operating environment. Eastman 2380 serves the commercial aviation industry and military aviation with oxidative stability and minimum formation, providing improved reliability.
What does it mean in the field?
Extended durations between draining oil, marked reduction in waste oil generation, and ultimately lower operating costs with increased performance and increased reliability.
Supporting Extended On-Wing Life With Eastman 2380 Turbine Oil
Eastman Turbo Oil 2380 is a synthetic lubricant widely used in the aviation industry for aircraft gas turbines and their associated components. Sold in a case of 24 quarts, or in a pallet of 40 cases (960 individual quarts), we have whatever quantity you need, no matter how large your mission is.
Expedited delivery may be available for this item. Please contact our team of specialists to inquire.
For any questions, expedited delivery requests, large order inquiries, or to confirm product availability, reach out to Greenwood Aerospace at gsasales@greenwood.aero or give us a call at 580-865-6000 or 833-GSA-EBUY (833-472-3289).
As a proud Native American-owned, HUBZone-certified small business, we are committed to delivering high-quality service with rapid, reliable delivery. Additionally, we are a U.S. Department of State ITAR-registered entity, which enables us to partner with large defense contractors on various military initiatives involving the export of ITAR-controlled items. We hold the following certifications:
UEI: KVSUYYSJS174
DUNS: 604006874
Cage Code: 2Y735
ITAR DDTC Export Compliant
AS9120B QMS Certified
NAICS: 488190, 336413, 332722, 336411, 336413, 481212, 532411
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