Diesel fuel
Diesel fuel means any of the following:
(1) Any fuel sold in any State or Territory of the United States and suitable for use in diesel engines, and that is one of the following:
(i) A distillate fuel commonly or commercially known or sold as No. 1 diesel fuel or No. 2 diesel fuel.
(ii) A non-distillate fuel other than residual fuel with comparable physical and chemical properties (e.g., biodiesel fuel).
(iii) A mixture of fuels meeting the criteria of paragraphs (1)(i) and (ii) of this definition.
(2) For purposes of subpart M of this part, any and all of the products specified at ยง 80.1407(e).
Source
40 CFR § 80.2
Scoping language
The definitions of this section apply in this part unless otherwise specified. Note that many terms defined here are common terms that have specific meanings under this part.