Methods of testing petroleum and associated products - CGSB Cetane Index of Diesel Fuels

1.1 This method describes a means for calculating the cetane index of diesel fuels (without cetane improvers) from the

aniline point, distillation, density and viscosity. The index, as computed from the prescribed formula, is termed the

CGSB Cetane Index (CI).

1.2 A suggested procedure is also outlined in Appendix A to estimate the cetane index, additized (CIA), based on the

calculated cetane index for diesel fuels containing diesel ignition improver (DII). This procedure can be used to

estimate the combustion quality when CI and DII are used, and a cetane engine test is not performed. The

Appendix A does not form a mandatory part of this method.

1.3 The testing and evaluation of a product against this method 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 method 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.