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Old 12-29-2019, 10:48 PM   #14
Carl Spangler
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Join Date: Oct 2013
Location: Central Coast Ca.
Posts: 417
Re: Are valve guide umbrellas really needed?

Quote:
Originally Posted by vince1 View Post
To prolong its life I would recommend that you use the oil recommended for flat tappet engines.
I'm currently using Delo 400XLE 15-40 diesel oil

API Service Categories CK-4, CJ-4, CI-4 PLUS, CI-4, CH-4, SN, SN PLUS

https://cglapps.chevron.com/sdspds/P...&docFormat=PDF
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