40 CFR 1065.725
§ 1065.725 High-level ethanol-gasoline blends.
United States · 40 CFR — Protection of Environment · Status: effective
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- Citation
- 40 CFR 1065.725, § 1065.725 High-level ethanol-gasoline blends, United States, version 1 as recorded 2026-07-09, yourstate.us, https://yourstate.us/provision/195807
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Full text
For testing vehicles capable of operating on a high-level ethanol-gasoline blend, create a test fuel as follows:
(a) Add ethanol to an E10 fuel meeting the specifications described in § 1065.710 until the ethanol content of the blended fuel is between 80 and 83 volume %.
(b) You may alternatively add ethanol to a gasoline base fuel with no ethanol if you can demonstrate that such a base fuel blended with the proper amount of ethanol would meet all the specifications for E10 test fuel described in § 1065.710, other than the ethanol content.
(c) The ethanol used for blending must be either denatured fuel ethanol meeting the specifications in 40 CFR 1090.270, or fuel-grade ethanol with no denaturant. Account for the volume of any denaturant when calculating volumetric percentages.
(d) The blended test fuel must have a dry vapor pressure equivalent between 41.5 and 45.1 kPa (6.0 and 6.5 psi) when measured using the procedure specified in § 1065.710. You may add commercial grade butane as needed to meet this specification.
Legislative history
This is a federal regulation, adopted through agency rulemaking under the Administrative Procedure Act — not enacted by a recorded vote of Congress.