Today’s Extended Life Coolants require periodic lab testing. There is not a field test that can accurately measure dilution and contamination. The Penray PTK-103 Coolant and Diesel Fuel Lab Test Kit is the only test kit that will perform a ‘LEVEL 5’ test. This is imperative for NOAT and OAT coolants. All lab tests are performed by an independent laboratory. After submitting your sample, a detailed analysis sheet will be provided.