I hope that my 24V is as tuff as these 12V, here's why. My friend Kevin has a "96" 3500 stake body dump that he bought new, it now has 66,800 miles on it,he's in landscaping. Needless to say everybody that works for him drives it. We got talking about our diesels,to make a long story short,up until yesterday,he had never changed his air filter, and only changed his oil 3 times. Up until a month ago,I changed his fuel filter for the very first time. He and his employes NEVER idol the motor to cool down, they just shut it off, they don't ,wait to start lite to go out,hop in,turn key, and go. If this isn't abuse I don't know what is,at least in my eyes anyway. I just hope my Cummins holds up as well as his. BTW, the only time it's been to the dealership is when he picked it up new. Mike