My current tank is showing 67plus on the display with over a hundred miles driven. It is about to go in the toilet as there is a winter storm heading our way but I'm expecting entire tanks in the 70ies come summer.

A lot of things must come together to get that kind of mileage out of a car rated at 51 highway (MT). Some you have no control over so you just kinda got to get lucky.

Here is a list of things that help get good mileage:

Warm weather
Dry weather
Long average trip lenght with no or few stops
Slow non stop driving
Not going so slow you gotta come out of top gear
High tire pressure
Low oil viscosity
Engine off coasting (be careful!) This is a big one!
Drafting or surfing (be careful)
Low traffic
Light wind or traveling with the wind
Timeing stops so you don't gotta stop
Using brakes as little as possible
Conserving energy on hills by ramping up to speed before a hill and cresting the hill at a low speed