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Clem Clement · 07-22-2021, 10:00 PM

I change oils a couple 3 months ago. Used Pennzoil. Truck driven since only a few miles. Oil blackish again. I'll check as to what oil I used. detergent I think 10W40

07-22-2021, 10:00 PM	#1
Clem Clement Senior Member Join Date: May 2010 Location: Fairfax, VA Posts: 3,393	blackish engine oil I change oils a couple 3 months ago. Used Pennzoil. Truck driven since only a few miles. Oil blackish again. I'll check as to what oil I used. detergent I think 10W40