Title 40

SECTION 1065.703

1065.703 Distillate diesel fuel.

§ 1065.703 Distillate diesel fuel.

(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 the following table:

Table 1 of § 1065.703 - Test Fuel Specifications for Distillate Diesel Fuel

Property Unit Ultra low sulfur Low sulfur High sulfur Reference procedure 1
Cetane Number - 40−50 40−50 40−50 ASTM D613.
Distillation range:
Initial boiling point °C 171-204 171-204 171-204 ASTM D86.
10 pct. point 204-238 204-238 204-238 ASTM D86.
50 pct. point 243-282 243-282 243-282 ASTM D86.
90 pct. point 293-332 293-332 293-332 ASTM D86.
Endpoint 321-366 321-366 321-366 ASTM D86.
Gravity °API 32-37 32-37 32-37 ASTM D4052.
Total sulfur, ultra low sulfur mg/kg 7-15 See 40 CFR 80.580.
Total sulfur, low and high sulfur mg/kg 300-500 800-2500 ASTM D2622 or alternates as allowed under 40 CFR 80.580.
Aromatics, min. (Remainder shall be paraffins, naphthenes, and olefins) g/kg 100 100 100 ASTM D5186.
Flashpoint, min. °C 54 54 54 ASTM D93.
Kinematic Viscosity cSt 2.0-3.2 2.0-3.2 2.0-3.2 ASTM D445.

1 ASTM procedures are incorporated by reference in § 1065.1010. See § 1065.701(d) for other allowed procedures.

(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]