{"data":{"id":"us/40-cfr-1065.735","jurisdiction":"us","citation":"40 CFR 1065.735","heading":"Diesel exhaust fluid.","body":"(a) Use commercially available diesel exhaust fluid that represents the product that will be used in your in-use engines.\n(b) Diesel exhaust fluid for testing must generally conform to the specifications referenced in the definition of “diesel exhaust fluid” in § 1065.1001. Use marine-grade diesel exhaust fluid only for marine engines.","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":"320b4f6fe54167831953bdfaea3bee1b16d4d2460071797b718fc92b8969a4bb","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-1065.725","next":"us/40-cfr-1065.740"},"notice":"GroundRules: Original legal text. Not legal advice."}