{"data":{"id":"us/40-cfr-1065.703","jurisdiction":"us","citation":"40 CFR 1065.703","heading":"Distillate diesel fuel.","body":"(a) Distillate diesel fuels for testing must be clean and bright, with pour and cloud points adequate for proper engine operation.\n(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.\nTable 1 of § 1065.703—Test Fuel Specifications for Distillate Diesel Fuel\nProperty Unit Ultra low sulfur Low sulfur High sulfur Reference procedure a\nCetane Number 40-50 40-50 40-50 ASTM D613.\nDistillation range:\nInitial boiling point °C 171-204 171-204 171-204 ASTM D86.\n10 pct. point 204-238 204-238 204-238\n50 pct. point 243-282 243-282 243-282\n90 pct. point 293-332 293-332 293-332\nEndpoint 321-366 321-366 321-366\nGravity °API 32-37 32-37 32-37 ASTM D4052.\nTotal sulfur mg/kg 7-15 300-500 800-2500 ASTM D2622, ASTM D5453, or ASTM D7039.\nAromatics, min. (Remainder shall be paraffins, naphthenes, and olefins) g/kg 100 100 100 ASTM D5186.\nFlashpoint, min. °C 54 54 54 ASTM D93.\nKinematic Viscosity mm2/s 2.0-3.2 2.0-3.2 2.0-3.2 ASTM D445.\na Incorporated by reference, see § 1065.1010. See § 1065.701(d) for other allowed procedures.\n(c) You may use the following nonmetallic additives with distillate diesel fuels:\n(1) Cetane improver.\n(2) Metal deactivator.\n(3) Antioxidant, dehazer.\n(4) Rust inhibitor.\n(5) Pour depressant.\n(6) Dye.\n(7) Dispersant.\n(8) Biocide.","path":["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"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-40.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:26:04Z","sha256":"1ef8abf379f4a26c0ae667f020bf404a62eebb700f20b157ee64676db2184690","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-1065.701","next":"us/40-cfr-1065.705"},"notice":"GroundRules: Original legal text. Not legal advice."}