I have macks, and my grandad had macks for almost 40 years. The only thing mack about these new macks is the part between the mudflaps. I am trying to keep mine machanical. I don't understand how you can justify these emission standards when these new electronic motors burn a 1/3 more fule to do the same work, not to mention you have to be a nasa engineer to change the oil. I can just imagine how well this urea injection will work. Since amonia an metal react so well together. You can only do so much with a diesel, you still need fuel, and air, and you can only get the exhaust gases so hot. I wouldn't have anything else, but I will rebuild an old one before I'll buy a new one. I suppose volvo will do to mack what the did to Clark Michigan, make it comfortable and plastic. If that is what everyone wants enjoy. I am happy with my dinosours. Sorry I spun out of control on that one.