It was a monster, clocking in at 1370 miles, 13.4 miles per gallon, and 60 mph average speed. I stopped at a weigh and check station in Idaho and found the trailer was around 4500 lbs, 1200 lbs. overweight for the 850. I could have lost the transmission on my 850, but I got lucky. Don’t make the same mistake — weigh your trailer and Volvo before setting out on a trip.