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Click on image for the lowdown. 
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| | Forums66 Topics128,052 Posts1,055,728 Members48,426 | | Most Online14,466
Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
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For helping keep this great
old truck web site
on the Internet for over 30 years! and not clogged down
with Ads!  Again, thanks!
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| | | Joined: Dec 2003 Posts: 2,733 Shop Shark | | Shop Shark Joined: Dec 2003 Posts: 2,733 | 20W or 30W are both good on the older engines depending on the tempeture.
Do a search on motor oils and you'll find more then you want to know. It is a very old topic here and has recent updates..
ps. this question is one that gets tons of replies because everyone has their own favorite brand and experience. | | |
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