My tires were down to 32 psi. So I stopped at a Wawa to fill them to the specified 35 lbs. I set the pump to 35 and refilled stopping when the machine signaled full. While driving away my dash readout came on showing 29 lbs in all tires. When I got home I checked them manually and they were all at 29 psi. Guess I will just drag out my compressor at home at refill them myself from now on. How many people fill up there and hit the road not knowing that they are approaching a dangerously low tire?