Hi there. my first post. im buying a diesel yard truck for the sole purpose of running stuff around our extensive facility. we have always used gas trucks. ive researched the 6.0 and i really like them once the. ulletproofing is done and we would do that. my question is has anybody successfully run filtered used motor oil through a 6.0? that is a requirement for this truck. we have 6 sections of land, the truck will be running on our property only, so i dont have to worry about the whole road tax thing. we have a full shop and it shouldnt even need to ho to town for maintainence. ive never seen any 6.0's on wmo. only 7.3. i will get us a 7.3 if i have to but would prefer a 6.0 2005 and later for the better front end suspension as the truck is going to be 100% mule grunt. thnx for your time.