{"data":{"id":"us/40-cfr-1065.801","jurisdiction":"us","citation":"40 CFR 1065.801","heading":"Applicability.","body":"(a) This subpart applies for testing with oxygenated fuels. Unless the standard-setting part specifies otherwise, the requirements of this subpart do not apply for fuels that contain less than 25% oxygenated compounds by volume. For example, you generally do not need to follow the requirements of this subpart for tests performed using a fuel containing 10% ethanol and 90% gasoline, but you must follow these requirements for tests performed using a fuel containing 85% ethanol and 15% gasoline.\n(b) Section 1065.805 applies for all other testing that requires measurement of any alcohols or carbonyls.\n(c) This subpart specifies sampling procedures and calculations that are different than those used for non-oxygenated fuels. All other test procedures of this part 1065 apply for testing with oxygenated fuels.","path":["Title 40—Protection of Environment","CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY","SUBCHAPTER U—AIR POLLUTION CONTROLS","PART 1065—ENGINE-TESTING PROCEDURES","Subpart I—Testing With Oxygenated Fuels"],"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":"cdf9b97ae879d1f02c9da986fe8f014750167967f3dc8077e16c941c28b819a4","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-1065.790","next":"us/40-cfr-1065.805"},"notice":"GroundRules: Original legal text. Not legal advice."}