---
kind: "unit"
title: "40"
title_heading: "Protection of Environment"
key: "chI/subchQ/part600"
level: "part"
label: "Part 600"
heading: "Fuel Economy and Greenhouse Gas Exhaust Emissions of Motor Vehicles"
release: "ecfr-current"
date: "2026-08-27"
url: "https://uscodex.org/cfr/40/chI-subchQ-part600"
sections_count: 45
---

# Part 600 — Fuel Economy and Greenhouse Gas Exhaust Emissions of Motor Vehicles

Title 40 C.F.R. — Protection of Environment › Chapter I — Environmental Protection Agency › Subchapter Q — Energy Policy

## Contents

- [Subpart A — General Provisions](/cfr/40/chI-subchQ-part600-subpartA.md)
- [Subpart B — Fuel Economy and Exhaust Emission Test Procedures](/cfr/40/chI-subchQ-part600-subpartB.md)
- [Subpart C — Procedures for Calculating Fuel Economy and Carbon-Related Exhaust Emission Values](/cfr/40/chI-subchQ-part600-subpartC.md)
- [Subpart D — Fuel Economy Labeling](/cfr/40/chI-subchQ-part600-subpartD.md)
- [Subpart E — Dealer Availability of Fuel Economy Information](/cfr/40/chI-subchQ-part600-subpartE.md)
- [Subpart F — Procedures for Determining Manufacturer's Average Fuel Economy](/cfr/40/chI-subchQ-part600-subpartF.md)