28k miles since head gasket and upper end rebuild. Oil has been changed at least 3 times since then. Mobil Delvac ESP 5w-40 with XG9100 filter, 7k miles on this oil change for both oil and filter.
Disregard them calling it a Cummins. It's not, I double checked.
Disregard them calling it a Cummins. It's not, I double checked.
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