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52flthed · 10-31-2020, 07:38 AM

Thanks guys for all your advice I really appreciate it helps to put things into perspective I realize I’m probably over shooting assuming a rebuild. Speaking of oils I should also mention that since I’ve owned the truck in late 2019 I believe we have been mistakenly using a detergent straight 30 weight oil. NAPA labels there SAE 30 As simply 30 weight without dummy labeling identification as it being “a detergent” . While their non-detergent 30 they Clearly label it as “non-detergent“. Well I think we both got fooled by assuming a straight 30 was a non detergent oil. Yikes!

That would explain all of my recent oil changes as the oil being very black. Could this also cause this issue with this one cylinder being low compression?

10-31-2020, 07:38 AM	#15
52flthed Senior Member Join Date: Oct 2019 Posts: 175	Re: Rebuild Advice 8BA Thanks guys for all your advice I really appreciate it helps to put things into perspective I realize I’m probably over shooting assuming a rebuild. Speaking of oils I should also mention that since I’ve owned the truck in late 2019 I believe we have been mistakenly using a detergent straight 30 weight oil. NAPA labels there SAE 30 As simply 30 weight without dummy labeling identification as it being “a detergent” . While their non-detergent 30 they Clearly label it as “non-detergent“. Well I think we both got fooled by assuming a straight 30 was a non detergent oil. Yikes! That would explain all of my recent oil changes as the oil being very black. Could this also cause this issue with this one cylinder being low compression?