I took a trip over to Helena from Great Falls. Just to put my drive in perspective Great Falls is over 3,300 ft in elevation and Helena is just over 4,000 ft. To get to Helena you have to cross the mountains, so I would say I was climbing some grades that ended up being 4,500 -5,000 ft. The shifting was great going through the mountains on the interstate.
On the way over I was getting alot of head wind also, the wind was probably at least 40 mph coming head on. Had that wonderful
flapping with the marker lights. The wind is blowing 30 mph outside now.
I did 173 miles and got 14 mpg with the 315 tires. I have a little over 312 miles on the pcm now.