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Click on image for the lowdown. 
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| | | Forums66 Topics128,181 Posts1,057,152 Members48,464 | | 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!
| | | | Joined: Dec 2008 Posts: 1,922 'Bolter | | 'Bolter Joined: Dec 2008 Posts: 1,922 | The engine and oil are not hot when you start it. That's what multi-viscosity is for.
The factory recco for straight weight oil is 20.
30W is not "weight", it's "winter" (viscosity at 23° F, -5° C): thick all the time. | | |
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