§ 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]