CFR > Title 40 - Protection of Environment > CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY > SUBCHAPTER Q—ENERGY POLICY (Parts 600–611) > PART 600—FUEL ECONOMY AND CARBON-RELATED EXHAUST EMISSIONS OF MOTOR VEHICLES > SUBPART B—Fuel Economy Regulations for 1978 and Later Model Year Automobiles—Test Procedures (§600.101-08 to §600.115-08) > 600.108-78—Analytical gases.