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 a
Cetane Number 40-50 40-50 40-50 ASTM D613
Distillation range:
Initial boiling point
10 pct. point
50 pct. point
90 pct. point
Endpoint
°C 171-204
204-238
243-282
293-332
321-366
171-204
204-238
243-282
293-332
321-366
171-204
204-238
243-282
293-332
321-366
ASTM D86
Gravity °API 32-37 32-37 32-37 ASTM D4052
Total sulfur mg/kg 7-15 300-500 800-2500 ASTM D2622, ASTM D5453, or ASTM D7039
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 mm 2/s 2.0-3.2 2.0-3.2 2.0-3.2 ASTM D445

a Incorporated by reference, see § 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; 85 FR 78468, Dec. 4, 2020]