From looking at my UOA can I tell if I can extend the change intervals? If so what do I keep an eye on the Insolubles? I have always had my FS on my truck and never changed it without changing the oil even on the 15K UOA. Now I'm switching to SYN. oil and plan to extend my change intervals more. The truck is a 06 Duramax 6.6L oil was Delo 400 15/40 going to be switching to Rotella T syn 5/40.
Thanks
Thanks
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