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§ 86.113-27 Fuel specifications.
Use the fuels specified in 40 CFR part 1065 to perform valid tests, as follows:
(a) For service accumulation, use the test fuel or any commercially available fuel that is representative of the fuel that in-use vehicles will use.
(b) For diesel-fueled engines, use the ultra low-sulfur diesel fuel specified in 40 CFR part 1065.703 for emission testing.
(c) The following fuel requirements apply for gasoline-fueled engines: