Reciprocating internal combustion engines; performance; part 1: standard reference conditions and declarations of power, fuel consumption and lubricating oil consumption; Amendment 1

This technical specification serves as a modification to the foundational document concerning performance characteristics of reciprocating internal combustion engines. It specifically addresses the standard reference conditions and declarations regarding power output, fuel consumption rates, and lubricant consumption. The content establishes necessary adjustments to the baseline requirements defined in the primary publication from 1986. By introducing these amendments, the document ensures that performance data remains consistent and comparable across different testing scenarios and environmental conditions. It defines the parameters that must be applied when reporting engine efficiency and output metrics. The revision provides clear guidelines for manufacturers and testing laboratories to maintain uniformity in how engine performance is measured and presented. This update clarifies previously ambiguous points and integrates updated methodologies into the existing framework. Adherence to these specified conditions allows for accurate benchmarking and facilitates international trade by ensuring that all parties utilize the same calculation and reporting standards. The document acts as an essential supplement to the core standard, refining the technical approach to evaluating engine performance without altering the fundamental principles established in the original release.