Just checked my speedo against two different GPS Speedo apps, and at 70 mph they were all within 1 mph. Based in that I don’t see the need to reprogram.
My 4xe got between 800-1,000 miles per tank driving around home. It was awesome until the A/C compressor shit the bed at 6,000 miles. Fun fact: the 4xe won’t run without A/C because of potential battery overheating. Jeep had no idea how long it would take to get one. Several months likely. So I...