Made it back home safe and sound. No issues with Dark Aero or the truck. Been thinking of naming the truck...WTT?! fer "What The Truck?!". What do you think of that?
Just crossing into New Mexico from Arizona at around the 3 mile marker to about the 14 mile marker, the elevation only changed 5' over the course of 11 miles, 4137' to 4142'. With the cruise control set to 65mph, the indicated mileage was just over 32mpg. No other traffic fer a good 7 uninterrupted miles and about 3 vehicles passed me before and after this stretch.
I did git my best ever tank with Dark Aero on I-10 from El Paso to Junction TX (even with 2 stops, a 3 hour rest stop in Van Horn in the early morning--engine coolant cooled down from 201 to 156 and a stop fer breakfast in Ft Stockton)...which was just over 31mpg!