Hi, I own two volts a 2014 and 2019, the 14 is still getting 36miles per charge. The 19 has never reached the 53 miles per charge as advertise. The best it done is up to 45 it has less the 5k and still under the warranty. I have taken it to the dealer, that has say that is the best it will do. Call GM and got the run around. Is this normal, so use to the 14 getting good miles. Suggetions please. Oh yes both this car are in southern Ca.