This document describes the evaluation to determine the equivalency of test methods used on a global scale in quality specifications of petroleum products, lubricants, and fuels. This document focuses on whether the standardized test methods for determining density are to be considered technically equivalent. This is to guide laboratories that use one standard test method and wish to know if they can also certify product towards the others. This International Standard establishes the general classification system which applies to petroleum products, lubricants and related products, defines the classes of petroleum products, lubricants and related products together with their designation. The rules of this classification system to apply to each class of product concerned will be specified in the relevant International Standard.