(815 ILCS 370/4)
(from Ch. 5, par. 1704)
(a) All motor fuel and petroleum sold or offered for sale in the State of
Illinois shall conform to the standards of this Act. The standards set
forth in the Annual Book of ASTM Standards Section 5, Volumes 05.01, 05.02, 05.03, 05.04 and 05.05 and
supplements thereto, and revisions thereof are adopted unless modified or
rejected by a regulation adopted by the Department. In addition, any
advertised or labeled declarations regarding the quality of a motor fuel
which are more stringent than ASTM standards shall be met.
(a-5) The quality of gasoline-oxygenate blends sold or offered for sale in this State shall meet the standards set forth in Section 188.8.131.52 or Section 184.108.40.206 of the Uniform Engine Fuels, Petroleum Products, and Automotive Lubricants Regulation as provided under the National Institute of Standards and Technology Handbook 130, and any of its subsequent supplements or revisions, except as specifically modified, amended, or rejected by regulation issued by the Director.
(b) Minimum Automotive Gasoline Octane Requirements.
All leaded and unleaded gasoline sold in this State shall meet or exceed
the following minimum octane numbers:
Regular Grade 87
Midgrade or Plus 89
Premium or Super Grade 91
An octane number is determined by adding the research octane number to the
motor octane number and dividing by 2. (RON + MON)/2. In addition, the motor
octane number shall not be less than 82.0. All gasoline products sold at
retail shall have an octane number displayed.
(c) Each seller of a motor fuel shall notify the purchaser of the type and
quantity of motor fuel purchased. For gasoline, the type shall indicate the
octane number. This information shall appear on the bill of lading, manifest,
or delivery ticket for the fuel. This subsection does not apply to sales at
(d) All gasoline products shall meet the most recently
adopted ASTM standards for spark-ignition motor fuel, and those standards
adopted under the provisions of the federal Clean Air Act by the U. S.
Environmental Protection Agency shall be the standards of this State in those
areas in which the federal Clean Air Act fuel standards apply.
(e) All biodiesel with a numerical value of B99 or above that is sold or offered for sale in the State of Illinois shall conform to the ASTM D6751 Standard Specification for Biodiesel Fuel Blend Stock (B100) for Middle Distillate Fuels. For the purposes of this subsection (e), "Biodiesel" means a fuel that (i) is comprised of mono-alkyl esters of long-chain fatty acids derived from vegetable oils or animal fats and (ii) meets the requirements of the ASTM D6751 standards.
(Source: P.A. 96-528, eff. 1-1-10; 96-1333, eff. 7-27-10.)