Sterling Performance | Testing Services, Fuel Testing, Durability Testing, Permeation Testing, Automotive Laboratory Testing We are an ISO/IEC 17025 accredited facility offering a wide range of test and analysis services, from lithium ion battery testing, to vibration testing, NVH Sterling Performance offers unparalleled testing services through our Millford, MI testing facilities. Our highly experienced laboratory staff ensures high quality workmanship for the automotive, marine, off-road and industrial industries.