I have tried the inflator on two cars so far. My 2010 Camaro SS and 2006 Dodge Durango. Both cars were low pressure, the Dodge was 25psi, should be 33, the Camaro SS was 25psi, should be 36. I set the regulator to the Wagan inflator (it's not easy to get exact psi so I close the regulator). My Durango pumps everything but 33 Zero Emission. It took about 3 minutes for each hoop. The Camaro SS needed more air (25 to 36 psi), so it took about 4 minutes per tire. I have a tire pressure sensor in my