In the attached file did you change any of the transmission settings yet or is it 100% stock? It looks like the 2018 vs 2016 factory tunes are quite different in some areas. Just wondering if it is due to better info or feedback from the field. And what harm would it do to make changes to the 2016 tune to match the 2018 calibration.
Here is the current tune I am running in my truck. Even with outside temps running in the 90's with the ac on I am getting 18-20 mpg in mixed city/highway. It pulls good from a stop, shifts well but with the occasional downshift clunk when coming off the highway.
O would be interested in your thoughts on this.