Anyone have experience with this engine? Currently own a 2004 freightliner with a Cat that I'm selling and looking for a possible replacement. Truck will be loaded to about 81,500 one way, empty back. Looking for an idea on fuel mileage, hopefully better than the 5.25 I get now, maintenance needed at current mileage if not done and what the general reliability is. I've only had one tow and one service call on my freightliner in 5 years and would like to keep it that way.