I wasn't trying to push it to increase the intervals, mainly to see what was going on inside the engine since I haven't always been the owner, and I ran the piss out of it. I am going to push it up to 10k intervals, but only for personal convenience. Im going to have another sample measured when this hits 10k, and see what it says, and then again somewhere around 60k when I flush the transmission and have that tested as well.
I'm sure the transmission is going to show a lot of **** in it.
I’ve got the 6.7 and just change the fluids and filters when the computer tells me to. On average, over 4 changes, it has been around the 7000 mile mark that the light comes on.
I’m hoping that will change once I delete and add more filtration. I’m also keeping my fingers crossed for a 10k mile average.
Either way, my grandfather always told me not to change the oil unless I felt metal in it with my fingers when I checked the levels.
He would go, 10-15k miles between fluid changes when I was growing up and that truck still ran like a top after my aunt sold it 25 years after he died.
Personally, I think OEM manufacturers tell you to do it more often for sales reasons, but I’ve always erred on the conservative side.
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