ASTM International has a new guide to help test developers evaluate a test method’s capability to measure properties of lubricants and other petroleum products. The guide allows users to determine and compare the relative performance of different tests that measure the same property in a specific application and assesses if reproducibility and repeatability are adequate for its intended use. “For those test methods with less than optimal precision, the responsible subcommittees would have an opportunity to investigate, suggest improvements in the procedure and design an interlaboratory study as necessary,” ASTM notes. The seven-page guide is available as a PDF file or hard copy for $48. Web: www.astm.org