Towed my 14,500# 5er through the Ozarks, and I was once more reminded of what a fine truck this '09 3500 Ram is. Averaged 9-10 MPG and loved the way the EB held it to the speed I wanted coming down the steep grades. This is my 3rd Cummins. I don't use this truck much when I'm not towing, because it's just too big for tight parking places, etc., but I love it when it's doing what I bought it to do.