From FB (Illinois Storm Community) -
"Stopping to get coffee I wanted to show everyone this. Im in my 18 wheeler and loaded up at 77,500 pounds. All morning I've been averaging about 7 miles per 1 gallon of diesel, which is my daily average. I turned east to follow the wind and now I'm averaging 10 mpg! The wind is pushing me that much so please DRIVE SAFE ARRIVE SAFE!"