abscate wrote: 11 Nov 2019, 17:49
You settle the oil change interval question with data from Blackstone.
My all highway P2 driven tested like new oil at 7500 miles, even TBN was like new, no water, no fuel.
I change it at 7500 and top off the T5 with the old oil
I'm with you. 7500 miles with Mobil 1 and fresh Mann filter







