Jet A/Jet A-1

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Jet A and Jet A-1 are kerosene-type fuels. The primary difference between the two is freeze point, the temperature at which wax crystals disappear in a laboratory test.

Jet A, which is mainly used in the United States, must have a freeze point of minus 40ºC or below and does not typically contain static dissipator additive. Jet A-1 must have a freeze point of minus 47ºC or below and for locations outside the United States, this fuel normally contains static dissipator additive. There are other key differences between the manufacturing specification within the United States and Europe/Africa/Middle East/Australasia.

Def. Stan. 91-91 has an additional requirement for lubricity for Jet A-1.

ExxonMobil Jet A and ExxonMobil Jet A-1 meet the requirements of ASTM D1655 Standard Specification for Aviation Turbine Fuels. ExxonMobil Jet A-1 also complies with U.K. DEF STAN 91-91, and the JIG (Joint Inspection Group) Aviation Fuel Requirements for Jointly Operated Systems (Check List). In all cases, the most recent issue of relevant specifications applies to the product supplied.

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  • ASTM D 1655
  • Mil U.K. DEF STAN 91-91
  • Mil & JIG Aviation Fuel Requirements for Jointly Operated Systems


ExxonMobil Jet A meets the following industry specifications:
ExxonMobil Jet A
ExxonMobil Jet A-1
ASTM D 1655 X X
ExxonMobil Jet A
ExxonMobil Jet A-1
Approved against Mil U.K. DEF STAN 91-91 Not applicable X
Approved against Mil and the JIG (Joint Inspection Group) Aviation Fuel Requirements for Jointly Operated Systems (Check List) Not applicable X

Product properties

Jet A
Jet A-1
Acidity, mg KOH/g 0.10 Max. 0.10 Max.
Aromatics, Vol. % 25 Max. 25.0
Sulphur, mercaptan, Wt. % 0.003 Max. 0.003 Max.
10% Distillation, ºC 205 Max. 205.0 Max.
Final Boiling Point, ºC 300 Max 300.0 Max
Distillation Residue, % 1.5 Max. 1.5 Max.
Distillation Loss, % 1.5 Max. 1.5 Max.
Flash Point, ºC 38 Min. 38.0 Min.
Density @ 15ºC, kg/m3 775/840 775/840.0
Freeze Point, ºC -40 Max -47.0 Max
Viscosity @ -20ºC, mm/s 8.0 Max. 8.0000 Max.
Net Heat of Combustion, MJ/kg 42.8 Min. 42.80 Min.
One of the following shall be met

1) Smoke Point, mm, or 25 Min. 25.0 Min.
Naphthalenes, Vol. % 3.0 Max 3.00 Max
Copper Strip Corrosion, 2 h % 100ºC No. 1 No. 1
Thermal Stability

Filter pressure drop, mm Hg 25 Max. 25 Max.
Tube Deposits < 3 Max. < 3 Max.
Existent Gum, mg/100 mL. 7 Max. 7 Max.
Water Reaction, Interface Rating 1b Max. 1b Max.
MSEP Rating

Without electrical conductivity additive 85 85
With electrical conductivity additive 70 70
Electrical conductivity, pS/m

50 Min. 600 Max.
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