The National Institute for Aviation Research (NIAR) at Wichita State University has added oil analysis to its growing list of test services. It provides trivector analysis, infrared spectroscopy, particle count/shape recognition, elemental analysis and viscosity testing. Test kits, purchased through the lab’s website, can be used to collect and return oil samples. Results are delivered by mail or e-mail. Test prices range from $22 to $44, including return postage.