CFR > Title 40 - Protection of Environment > CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY > SUBCHAPTER C—AIR PROGRAMS (Parts 50–99) > PART 86—CONTROL OF EMISSIONS FROM NEW AND IN-USE HIGHWAY VEHICLES AND ENGINES > SUBPART O—Emission Regulations for New Gasoline-Fueled Otto-Cycle Light-Duty Vehicles and New Gasoline-Fueled Otto-Cycle Light-Duty Trucks; Certification Short Test Procedures (§86.1401 to > 86.1413—Fuel specifications.

86.1413—Fuel specifications.

(a) The test fuel to be used for the CST test options described in tables O-96-1 and O-96-2 of § 86.1430(b) must conform to the specifications listed in paragraph (b) of this section except that for manufacturer data submittal testing for the purposes of obtaining a certificate of conformity and for Selective Enforcement Audit testing, the octane specification of the fuels does not apply. For all gasoline-fueled Otto-cycle light-duty vehicles and gasoline-fueled Otto-cycle light-duty trucks (including those certified to operate using both gasoline fuel and another fuel), CST procedures performed for the purpose of obtaining a certificate of conformity must be conducted using the appropriate gasoline fuel only, as indicated in paragraph (b) of this section.
(b) CST test fuels by option. (1) Test Option 1: Use Cold CO fuel as specified in the table in § 86.213-94.
(2) Test Option 2: Use Cold CO fuel, as specified in the table in § 86.213-94; optionally, the Administrator may substitute Otto-cycle test fuel, as described in § 86.113-94(a)(1).
(3) Test Option 3: Use Otto-cycle test fuel as specified in the table in § 86.113-94(a)(1).