MIL-DTL-5624V
2.4 Order of precedence. Unless otherwise noted herein or in the contract, in the event of a
conflict between the text of this document and the references cited herein, the text of this
document takes precedence. Nothing in this document, however, supersedes applicable laws and
regulations unless a specific exemption has been obtained.
3. REQUIREMENTS
3.1 Materials. The fuels supplied under this specification shall be refined hydrocarbon
distillate fuel oils, which contain additives in accordance with 3.3. The feedstock from which the
fuel is refined shall be crude oils derived from petroleum, oil sands, oil shale, synthesized
hydrocarbons, or mixtures thereof.
3.1.1 Synthesized Hydrocarbons (applies to Grade JP-5 fuel only). A maximum of 50
volume percent of the finished fuel may consist of Synthesized Paraffinic Kerosene (SPK) blend
components derived from Hydroprocessed Esters and Fatty Acid (HEFA) or Fischer Tropsch
(FT) produced SPK. FT-SPK blend components shall conform to the requirements in ASTM
D7566 Annex A1 with the exceptions as noted in Table I of this specification. SPK blend
components derived from HEFA shall conform to requirements in ASTM D7566 Annex A2 with
the exceptions as noted in Table I of this specification. Finished fuel containing synthesized
hydrocarbons shall conform to the properties listed in Tables II and IV. Finished fuel containing
synthesized hydrocarbons shall contain additives in accordance with 3.3 through 3.3.6. The U.S.
Army is currently in the process of qualifying their respective aircraft, ground vehicles, and
equipment to use fuel containing SPK. Fuels containing synthetic blending components shall not
be used in Army aircraft, ground vehicles, and equipment without approval from the following
cognizant activities.
Cognizant activities for the U.S. Army:
U.S. Army Ground: Fuels and Lubricants Technology Team,
RDECOM-TARDEC, RDTA-SIE-ES-FPT-FLT, Building 210,
6501 E. 11 Mile Road, Warren, MI 48397-5000.
U.S. Army Aviation: U.S. Army RDECOM,
Attn: RDMR-AEP, Building 4488,
Room C-211, Redstone Arsenal, AL 35898-5000.
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