Typical Physical Characteristics
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Properties |
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DEF STAN 91-98 |
Typical |
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Oil type |
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Synthetic |
Synthetic |
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ester |
Ester |
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Density @ 15°C |
kg/l |
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Report |
0.947 |
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Kinematic viscosity mm2/s |
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@ 40°C |
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36.0 max |
32 |
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@ 100°C |
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7.35 min |
7.47 |
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@ −40°C |
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13000 max |
10140 |
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@ −40°C after storage @ –54°C |
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for 12 hr |
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– |
10800 |
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Flashpoint Cleveland |
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Open Cup |
°C |
216 min |
242 |
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Pourpoint |
°C |
−54 max |
Below −54 |
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Total Acidity |
mgKOH/g |
Report |
0.03 |
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Foaming characteristics |
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Must pass |
Passes |
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Sediment |
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mg/l |
10 max |
Less than 10 |
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Total ash of sediment |
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mg/l |
1 max |
Less than 1 |
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Trace element content |
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Must pass |
Passes |
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Elastomer swell tests |
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Must pass |
Passes |
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Corrosivity, metal weight change |
Must pass |
Passes |
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Gear Machine Rating |
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Must pass |
Passes |
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Shear Stability |
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– viscosity change @ 40°C |
% |
2 max |
Less than 2 |
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– condition of oil |
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Must pass |
Passes |
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Compatibility and miscibility |
Must pass |
Passes |
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Homogeneity |
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@ 210°C |
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Must pass |
Passes |
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@ –40°C |
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Must pass |
Passes |
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Specifications
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U.S. |
– |
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British |
Approved DEF STAN 91- 98 (replaces |
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DERD 2487) |
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French |
Equivalent AIR 3517 |
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Russian |
Analogue to TU 38.1011722- 85 |
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Grade MN -7.5u |
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NATO Code |
O -149 (equivalent O -159) |
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Joint Service Designation |
OX – 38 |
Equipment Manufacturer’s Approval
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Honeywell |
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Auxiliary Power Units (some models) |
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Pratt & Whitney Canada |
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PT6 (some models) |
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Rolls-Royce |
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Dart, Tyne, Avon (some early models |
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only), Gnome, Pegasus, Palouste, |
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Nimbus, Proteus, Orpheus, |
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Olympus 200 and 300 |
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Sikorsky |
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S-61N transmissions |
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Soloviev |
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D30 engine |
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Turbomeca |
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Astazou, Bastan, Turmo, Artouste, Arriel, Malika |
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AeroShell Turbine Oil 750 is a 71?2 mm2/s synthetic mixed ester oil containing a thickener and additives which provide excellent load carrying, thermal and oxidation stability.