Diamond Class®AW Turbine Oil

Rust & Oxidation-Inhibited, Anti-Wear Turbine Oil

Phillips 66®Diamond Class AW Turbine Oil is a premium quality, rust and oxidation (R&O)-inhibited, anti-wear turbine oil developed for use in geared and direct-drive gas turbines and steam turbines in severe service.

Features & Benefits

• Outstanding oxidation resistance and thermal stability for long service life

• Protects against sludge and varnish formation

• Excellent wear protection for gears and bearings

• Protects against rust and corrosion

• Excellent water-separating properties

• Resists the formation of emulsions and bacteria buildup

• Good foam resistance

• Meets ISO Cleanliness Code rating of 18/16/13 (1)

(1) Note: Applies only to bulk product as delivered from Phillips 66 manufacturing plants. Particle counts may vary from lab to lab.


• Combined-cycle and co-generation gas turbines

• Gas turbines and steam turbines with gear drives

Technical Details

Licenses & Approvals

Diamond Class AW Turbine Oil meets the requirements of the following industry and OEM specifications:

• ABB G12106

• Alstom Power HTGD 90 117, for turbines without gear drives

• ASTM D4304-06a, Type II Turbine Oil

• British Standard 489

• Cincinnati Machine P-38 (ISO VG 32)

• DIN 51515 Part 1, Lubricating Oils, Type L-TD

• DIN 51515 Part 2, Lubricating Oils, Type L-TG

• DIN 51517 Part 2, Lubricating Oils, Type CL

• DIN 51524 Part 1, Hydraulic Oils, Type HL

• Elliott ring-oiled turbines, where mineral-based turbine oil is specified

• General Electric GEK 101941a, GEK 107395a, GEK 32568j, GEK 46506e, GEK 27070 (obsolete), GEK 28143b (obsolete)

• ISO 8068, Type L-TGB, Type L-TGSB

• Siemens Power Generation TLV 9013 04 (approved), TLV 9013 05

• Siemens Westinghouse 21T0591 (obsolete), 55125Z3 (obsolete)

• U.S. Military MIL-PRF-17672D, Symbol 2075 T-H (ISO VG 32), 2110 T-H (ISO VG 46), 2135 T-H (ISO VG 68)

• U.S. Steel 126

Additional Details
ISO Grade32
Specific Gravity @ 60°F0.862
Density, lbs/gal @ 60°F7.18
Color, ASTM D15000.5
Flash Point (COC), °C (°F)220 (428)
Pour Point, °C (°F)-39 (-38)
cSt @ 40°C32
cSt @ 100°C5.4
SUS @ 100°F165
SUS @ 210°F44.4
Viscosity Index102
Acid Number, ASTM D974, mg KOH/g0.14
Air Release, ASTM D3427, minutes2.2
Copper Corrosion, ASTM D1301a
Demulsibility, ASTM D1401, minutes to pass15
Foam Test, ASTM D892, Seq. I, mL0/0
Four-Ball Wear, ASTM D4172, Scar Diameter, mm0.5
Oxidation Stability
FZG Scuffing Test, ASTM D5182, Failure Load Stage10
TOST, ASTM D943-04a, hours>24,000
RPVOT, ASTM D2272, minutes>1,700
Rust Test, ASTM D665 A&BPass
Cleanliness Code, ISO 4406:199918/16/13