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Click on image for the lowdown. 
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| | | Forums66 Topics128,068 Posts1,055,881 Members48,428 | | 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!
| | THANKS!
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: Aug 2011 Posts: 687 Shop Shark | | Shop Shark Joined: Aug 2011 Posts: 687 | Agree with the above comments. I use 15W40 and change it regularly. For trucks that are just driven now and then, I change it several times a year and not wait for 3000 miles. That seems to work the best.
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