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What is the difference between the JP1 aviation fuel and the JP4 aviation fuel?

Question #64669. Asked by jimmyrussell23.
Last updated Sep 08 2016.

Answer has 3 votes
Currently Best Answer
19 year member
941 replies

Answer has 3 votes.

Currently voted the best answer.
The first difference is that JP-1,2 and 3 are obsolete, and JP-4 is almost exclusively used by the military--US Air Force and certain US Army aircraft. Several other differences in Jet Propulsion fuels used in both military and civilian applications can be found here:

Response last updated by CmdrK on Sep 08 2016.
Apr 15 2006, 9:47 PM
Answer has 2 votes
19 year member
941 replies

Answer has 2 votes.
Additional differences in the JP-1,2,3 and JP-4 (and current fuels) have to do with adjusting freeze points, economy (mixing naptha and kerosene with them extends availability) and safety precautions such as lowering flashpoints.

Apr 15 2006, 9:59 PM
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