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§1065.703 Distillate diesel fuel.

RegSenseAir EmissionsCFR RegulationsEnvironmental Protection Agency (EPA)Air ProgramsEnvironmentalAir QualityCFR SectionEnglishFocus AreaUSA

(a) Distillate diesel fuels for testing must be clean and bright, with pour and cloud points adequate for proper engine operation.

(b) There are three grades of #2 diesel fuel specified for use as a test fuel. See the standard-setting part to determine which grade to use. If the standard-setting part does not specify which grade to use, use good engineering judgment to select the grade that represents the fuel on which the engines will operate in use. The three grades are specified in Table 1 of this section.

Table 1 of §1065.703—Test Fuel Specifications for Distillate Diesel Fuel
PropertyUnitUltra low sulfurLow sulfurHigh sulfurReference procedure 
Total sulfurmg/kg7-15300-500800-2500ASTM D2622, ASTM D5453, or ASTM D7039.
Aromatics, min. (Remainder shall be paraffins, naphthenes, and olefins)g/kg100100100ASTM D5186.
Flashpoint, min.°C545454ASTM D93.
Kinematic Viscositymm2/s2.0-3.22.0-3.22.0-3.2ASTM D445.
a Incorporated by reference, see §1065.1010. See §1065.701(d) for other allowed procedures.
Cetane Number40-5040-5040-50ASTM D613
Distillation range:
Initial boiling point°C171-204171-204171-204ASTM D86.
10 pct. point204-238204-238204-238
50 pct. point 243-282 243-282 243-282
90 pct. point 293-332293-332293-332
Endpoint 321-366 321-366 321-366
Gravity°API32-3732-3732-37ASTM D4052.

(c) You may use the following nonmetallic additives with distillate diesel fuels:

(1) Cetane improver.

(2) Metal deactivator.

(3) Antioxidant, dehazer.

(4) Rust inhibitor.

(5) Pour depressant.

(6) Dye.

(7) Dispersant.

(8) Biocide.

[70 FR 40516, July 13, 2005, as amended at 73 FR 37340, June 30, 2008; 73 FR 59341, Oct. 8, 2008; 75 FR 23057, Apr. 30, 2010; 77 FR 2464, Jan. 18, 2012;79 FR 23807, Apr. 28, 2014; 85 FR 78468, Dec. 4, 2020; 86 FR 34569, Jun. 29, 2021]

['Air Programs']
['Air Emissions']
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