The guy said he put royal purple in it. I know that's supposed to be magical oil but I'm not sure it's the correct stuff. I looked at the RP website, they show they have some oil for dodge nv4500. I'm going to buy the GM stuff and change it right now. Then I'm going to get it rebuilt, or at least inspected, before it goes into the 'burb. I'm going to use the truck to help me move, about 4 hrs away. After I get to my new house then I'll yard that stuff out and put it in the garage. I may as well rebuild the motor too. I really want this to be done right. I can still go wheeling while I get the new motor/tranny ready. I've been reading alot on here and have gotten interested in new studs, high quality gaskets, gear drive, higher flow water pump, and also a girdle kit. I don't know much about it yet but I want the thing to last. How much more turbo can you put on it before it gets unreliable? I was reading stock is a GM-3, but you can get like a GM-8. I would of course like to explore some performance :-) Of course, after I rebuild it it'll probably run better and I won't want it as much. Are these injectors for real? Seems cheap. http://cgi.ebay.com/ebaymotors/CHEVY-GMC-MARINE-6-5-6-5L-TURBO-DIESEL-INJECTOR-NOZZLES_W0QQitemZ380132908649QQcmdZViewItemQQptZMotors_Car_Truck_Parts_Accessories?hash=item5881afde69&_trksid=p4506.c0.m245&_trkparms=65%3A12%7C39%3A1%7C72%3A1171 Should I mount the PMD elsewhere?