Federal regulations · Through 2026-08-25 · Newer source version available

40 CFR 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 Table 1 of this section.
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 °C 171-204 171-204 171-204 ASTM D86.
10 pct. point 204-238 204-238 204-238
50 pct. point 243-282 243-282 243-282
90 pct. point 293-332 293-332 293-332
Endpoint 321-366 321-366 321-366
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 mm2/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.

Where this section sits in the code

Title 40—Protection of Environment
CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY
SUBCHAPTER U—AIR POLLUTION CONTROLS
PART 1065—ENGINE-TESTING PROCEDURES
Subpart H—Engine Fluids, Test Fuels, Analytical Gases and Other Calibration Standards

(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

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 °C 171-204 171-204 171-204 ASTM D86.

10 pct. point 204-238 204-238 204-238

50 pct. point 243-282 243-282 243-282

90 pct. point 293-332 293-332 293-332

Endpoint 321-366 321-366 321-366

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 mm2/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.

(1) Cetane improver.

(2) Metal deactivator.

(3) Antioxidant, dehazer.

(4) Rust inhibitor.

(5) Pour depressant.

(6) Dye.

(7) Dispersant.

(8) Biocide.

Collected 2026-08-27T02:26:04Z. Source file · JSON

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