just wrapped up a 4000 mile trip in the PW in 6 days. Departed Louisville KY this past Thursday and made my way to Bozeman MT. I drove 1000 miles straight on the lowest grade of fuel available, with ethanol to Mitchell SD, where I slept in the truck and idled the engine for 7 hours straight while i slept in the back of the cab, woke up and drove the remaining 700 miles into Bozeman. Stayed two days, picked up my Go Fast Camper, then drove straight south through Yellowstone, the Wasatch range and into Fruita Colorado, where i stayed there for another two days. left Tuesday morning and headed straight home across I70 back to Louisville another 1400 miles in one jaunt.
All in all, the truck was set to 75mph on the cruise control the entire time, and sometimes 85. Faced a couple headwinds, but was otherwise an uneventful drive. temperature was as high as 45 and as low as -15. My main takeaway from this trip is the 6.4L would seriously benefit from a radiator blanket. I dont think i ever hit 210 degrees when i was on the highway, sometimes dropping as low as 175 degrees at speed. i know for sure that affected my fuel economy, and the super dense air as well. The radiator blanket would certainly help the drag co-efficient.
my trip computer, idle time included averaged 72 mph ant 12.9MPG (again, on the cheapest, worst fuel available). I noticed that on the two tanks i did get mid-grade, like the engine requests i was averaging 1.5-2mpg better fuel economy.
Untitled by
Will Marshal, on Flickr