I work for the telephone company for my day job and so have had a class A CDL for a long time to tow poles. Due to having 3 kids in college this year I decided I needed some extra income so have started hauling hay for the local ranches here. I'm driving a 97 Peterbuilt with a 3406 Cat in it. I have no other big trucks to compare to but boy am I ever impressed. It sure proves to me why an inline six is the engine to have when you have alot of weight to move. Even when it weighs 80,000 lbs launching is simply a matter of just letting out the clutch and you are on your way. Running empty with just the 40 foot drop bed trailer, I can pull a 7 percent grade at 65 without leaving 10th gear. I was somewhat surprised that it only makes 22. 5 lbs of boost, somehow I was expecting more. I was also really surprised that it has no e. g. t gauge. I guess the newer computer engines protect themselves from meltdown. I'm not sure I would want to do this for a living every day but I'm having fun for now!