40 CFR § 1066.145 - Test fuel, engine fluids, analytical gases, and other calibration standards.

---
identifier: "/us/cfr/t40/s1066.145"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "40 CFR § 1066.145 - Test fuel, engine fluids, analytical gases, and other calibration standards."
title_number: 40
title_name: "Protection of Environment"
section_number: "1066.145"
section_name: "Test fuel, engine fluids, analytical gases, and other calibration standards."
chapter_name: "ENVIRONMENTAL PROTECTION AGENCY"
subchapter_number: "U"
subchapter_name: "AIR POLLUTION CONTROLS"
part_number: "1066"
part_name: "VEHICLE-TESTING PROCEDURES"
positive_law: false
currency: "2026-03-24"
last_updated: "2026-03-24"
format_version: "1.1.0"
generator: "[email protected]"
authority: "42 U.S.C. 7401-7671q."
regulatory_source: "79 FR 23823, Apr. 28, 2014, unless otherwise noted."
cfr_part: "1066"
---


# 1066.145 Test fuel, engine fluids, analytical gases, and other calibration standards.

(a) *Test fuel.* Use test fuel as specified in the standard-setting part, or as specified in 40 CFR part 1065, subpart H, if it is not specified in the standard-setting part.

(b) *Lubricating oil.* Use lubricating oil as specified in 40 CFR 1065.740. For two-stroke engines that involve a specified mixture of fuel and lubricating oil, mix the lubricating oil with the fuel according to the manufacturer's specifications.

(c) *Coolant.* For liquid-cooled engines, use coolant as specified in 40 CFR 1065.745.

(d) *Analytical gases.* Use analytical gases that meet the requirements of 40 CFR 1065.750.

(e) *Mass standards.* Use mass standards that meet the requirements of 40 CFR 1065.790.