---
kind: "unit"
title: "40"
title_heading: "Protection of Environment"
key: "chI/subchU/part1065"
level: "part"
label: "Part 1065"
heading: "Engine-Testing Procedures"
release: "ecfr-current"
date: "2026-08-27"
url: "https://uscodex.org/cfr/40/chI-subchU-part1065"
sections_count: 174
---

# Part 1065 — Engine-Testing Procedures

Title 40 C.F.R. — Protection of Environment › Chapter I — Environmental Protection Agency › Subchapter U — Air Pollution Controls

## Contents

- [Subpart A — Applicability and General Provisions](/cfr/40/chI-subchU-part1065-subpartA.md)
- [Subpart B — Equipment Specifications](/cfr/40/chI-subchU-part1065-subpartB.md)
- [Subpart C — Measurement Instruments](/cfr/40/chI-subchU-part1065-subpartC.md)
- [Subpart D — Calibrations and Verifications](/cfr/40/chI-subchU-part1065-subpartD.md)
- [Subpart E — Engine Selection, Preparation, and Maintenance](/cfr/40/chI-subchU-part1065-subpartE.md)
- [Subpart F — Performing an Emission Test Over Specified Duty Cycles](/cfr/40/chI-subchU-part1065-subpartF.md)
- [Subpart G — Calculations and Data Requirements](/cfr/40/chI-subchU-part1065-subpartG.md)
- [Subpart H — Engine Fluids, Test Fuels, Analytical Gases and Other Calibration Standards](/cfr/40/chI-subchU-part1065-subpartH.md)
- [Subpart I — Testing With Oxygenated Fuels](/cfr/40/chI-subchU-part1065-subpartI.md)
- [Subpart J — Field Testing and Portable Emission Measurement Systems](/cfr/40/chI-subchU-part1065-subpartJ.md)
- [Subpart K — Definitions and Other Reference Information](/cfr/40/chI-subchU-part1065-subpartK.md)
- [Subpart L — Methods for Unregulated and Special Pollutants and Additional Procedures](/cfr/40/chI-subchU-part1065-subpartL.md)