ASTM D8279-23

Standard Test Method for Determination of Timing-Chain Wear in a Turbocharged, Direct-Injection, Spark-Ignition, Four-Cylinder Engine
standard by ASTM International, 07/01/2023

ASTM D6681-23

Standard Test Method for Evaluation of Engine Oils in a High Speed, Single-Cylinder Diesel Engine—Caterpillar 1P Test Procedure
standard by ASTM International, 07/01/2023