Texas3.0

I’m doing strictly highway driving. I took it in a few months ago because I felt it was using too much and I was told that it was normal consumption most likely due to high humidity and stricter emissions for 2020. Last week I had it back in the shop for a CEL and a ticking sound both of which went away by time I got it to the dealer. While it was there they said they did an update for excessive def consumption. I took it on a 600 mile round trip over the weekend and the digital gauge went from full to half a tank.

Mine is using 5 gallons of DEF about every 2200 miles.