Fuel specifications.

§ 86.113-15 Fuel specifications.

(a) Gasoline fuel. This paragraph (a) describes how to transition to an ethanol-blend test fuel for vehicles certified under subpart S of this part. You may use the test fuels specified in § 86.113-04(a) for vehicles that are not yet subject to testing with the new fuel. You may use the specified ethanol-blend test fuel anytime earlier than we specify as long as you use the corresponding procedures for measuring and calculating emission results. See 40 CFR 600.117 for special provisions that apply for emission measurements related to fuel economy and greenhouse gases. Manufacturers must certify using E10 test fuel as specified in 40 CFR part 1065, subpart H, and service accumulation fuel meeting applicable specifications as follows:

(1) Except as allowed under paragraph (a)(2) of this section, Use E10 test fuel to demonstrate compliance with the Tier 3 exhaust emission standards as specified in § 86.1811 and 86.1816, and to demonstrate compliance with the Tier 3 evaporative emission standards as specified in § 86.1813.

(2) You may use California test fuels to demonstrate compliance with Tier 3 emission standards as follows:

(i) For vehicles certified for 50-state sale, you may instead use California Phase 3 gasoline (E10) as adopted in California's LEV III program for exhaust emission testing. Through model year 2019, we will also use this E10 fuel for any low-altitude exhaust emission testing with such vehicles. Starting in model year 2020, we may use test fuel meeting either California Phase 3 gasoline (E10) or the gasoline (E10) test fuel specified in this paragraph (a). For cold temperature testing and for exhaust emission tests at high-altitude conditions, you may certify vehicles through model year 2019 based on testing with the gasoline (E0) test fuel specified in § 86.113-04(a); for such vehicles, we may use test fuel meeting either the gasoline (E0) test fuel specified in § 86.113-04(a) or the gasoline (E10) test fuel specified in this paragraph (a).

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