I have an 04. 5 600 cummins. When I bought my truck I was in the dealership looking at a sales pamphlet on the new 600 where it stated it was cleaner, quieter, and had extended the maint. interval from 3,750 / 7,500 to 7,500 / 15,000. I would have sworn that I also read this in my owners manual somewhere although I can't find it now. I'm taking my truck in for its second service and once again they are telling me I should be changing my oil every 3,750. When I site the new maint. schedule they say they've never heard of that. My truck rarely see's hard service. I almost never tow with it and so I'm disinclined to pay $150 or so every 3,750 mi. for no reason. Am I losing my mind or did they change the maint. interval on the new 600? If they did does anyone know where I can find this in writing so I can show the dealership because it seems like we are going to have this argument every time I take my truck in for service. On my first service I went into the showroom, picked up the sales pamphlet on the new 600 and took it back to the service dept. and showed it to them. All they could say is hmmm, they weren't aware of that. Since then I've moved and am dealing with yet another dealership that "isn't aware of that". What gives? Am I losing it or are they just trying to make more money off of me by charging for more frequent oil changes than necessary? If there is a new schedule does anyone know where I can find that in print? Thanks for the help.
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