Oil selection tool
Mobil Jet Oil II and Jet Oil 254 for aircraft gas turbine engines, and Mobilgrease 28 for wheel bearings and control mechanisms. Order online or ask an expert to help you choose.
Original Mobil oils
from an authorized distributor
Since 1993
in machine lubrication
0.95 L and 208 L
plus 2 and 16 kg grease from OlejeSklep
MIL and SAE specifications
per manufacturer data
Prices and availability come live from OlejeSklep.pl, the Mobipol shop.
Synthetic aviation turbine oil
Oil for aircraft gas turbine engines, MIL-PRF-23699 STD class, with SAE AS5780 SPC approval.
Choose it when:
Synthetic aviation turbine oil
Third-generation ester-based oil, MIL-PRF-23699 HTS class, thermally stable up to 232°C.
Choose it when:
Synthetic aviation grease
PAO grease with bentonite thickener for aircraft wheel bearings, actuators and control mechanisms.
Choose it when:
Not sure which product is approved for your engine? Ask an expert.
Oil in a gas turbine engine works from cold start to hot bearings. Wear starts with oxidation and deposits, and in airframe mechanisms with grease washout and corrosion.
Oxidation and deposits
Jet Oil II and Jet Oil 254 resist oxidation and limit deposits. Jet Oil 254 (HTS) is stable up to 232°C.
Cold start
Both oils work from −40°C. Mobilgrease 28 has very low starting torque at −54°C.
Wear and corrosion
Jet Oil II protects against wear and corrosion, Jet Oil 254 against corrosion. Mobilgrease 28 protects heavily loaded mechanisms, e.g. flap drive screws.
Grease washout by waterMobilgrease 28 resists water washout and is stable at high temperature.
Seals and metalsJet Oil II and Jet Oil 254 are compatible with turbine metals and Viton A and Buna N seals. Jet Oil II also with silicone.
Oil condition is judged by the trend across samples: viscosity, acid number, water and metals. The engine manufacturer sets the limits for each model. Ask an expert about testing aviation oil samples.
“Give me the engine model and the oil specification from the maintenance documentation. I will check which Mobil product is approved for it.”
A graduate of Poznan University of Technology. At Mobipol he provides technical support to industrial customers and runs training on oils and greases.
Prefer to call?+48 71 359 34 62Jet Oil II meets MIL-PRF-23699 STD and SAE AS5780 SPC, and Jet Oil 254 meets MIL-PRF-23699 HTS, with higher thermal stability (up to 232°C versus 204°C). The choice follows the engine maintenance documentation and the manufacturer’s approved oil list, not this page.
Both are compatible with other synthetic turbine oils meeting MIL-PRF-23699. The manufacturer does not recommend mixing, though, because the mixture loses some of the Mobil oil’s properties.
Aircraft gas turbine engines: turbojet, turbofan, turboprop and turboshaft in helicopters, in civil and military aviation. Piston engines are not on the manufacturer’s list of applications.
Both have engine manufacturer approvals, including CFM International, General Electric, Pratt & Whitney and Rolls-Royce, and accessory approvals from Honeywell and Hamilton Sundstrand. The full list is on the product data sheet.
In landing gear wheel bearings, control systems, actuators, drive screws, servo mechanisms and helicopter rotor bearings. The grease meets MIL-PRF-81322G and NATO G-395 and works from −54°C to 177°C.
