This standard applies to two types of automotive low-sulphur (LS) diesel fuel containing low levels of biodiesel esters, Type A-LS, Bx and Type B-LS, Bx.

Bx represents biodiesel fuel containing x percent by volume of biodiesel ester component in the range of 1.0 to 5%.

Fuel to this standard is intended for use in high-speed diesel engines that require low-sulphur diesel fuel to meet emission control regulations and high-speed diesel-powered equipment. (Fuel used in on-road (also called on-highway) diesel-powered equipment is regulated by various authorities (Appendix B).)

Limiting values of significant properties (Users of this standard are advised to refer to Appendix C regarding the significance of requirements for low-level biodiesel fuel blends.) are prescribed for two types of diesel fuel containing low levels of biodiesel esters. These types and their general applicability for use in diesel engines are broadly indicated as follows.

Type A-LS, Bx is intended for use in urban transit buses and passenger automobiles or when ambient temperatures require better low-temperature properties than Type B-LS, Bx.

Type B-LS, Bx is intended for use in engines in services involving relatively high loads as found in industrial and heavy mobile equipment, such as intercity trucks and construction equipment, and when ambient temperatures and fuel storage conditions allow use of such fuel.

Both types, Type A-LS, Bx and Type B-LS, Bx, may be used interchangeably with fuel meeting CAN/CGSB-3.517, Types A-LS and Type B-LS respectively.

Users of fuel meeting this standard are advised to consult with the equipment manufacturers regarding the suitability of the fuel prior to its use. (Users of this standard can obtain additional information on the use of "Fatty Acid Methyl Esters (FAME)" and the use of biodiesel fuel blends from the Fuel Injection Equipment (FIE) Manufacturers and from the Engine Manufacturers Association (EMA) at www.enginemanufacturers.org.)

The testing and evaluation of a product against this standard may require the use of materials and/or equipment that could be hazardous. This document does not purport to address all the safety aspects associated with its use. Anyone using this standard has the responsibility to consult the appropriate authorities and to establish appropriate health and safety practices in conjunction with any applicable regulatory requirements prior to its use.