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| | | Forums66 Topics128,023 Posts1,055,367 Members48,420 | | 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: Jan 2019 Posts: 41 'Bolter | | 'Bolter Joined: Jan 2019 Posts: 41 | I use Delo 15/40 diesel oil in all my older cars and trucks. The manufacturers have taken most of the extreme pressure lubricates out of it like zinc for the cat converters. Delo replaced the zinc with moly. Not as good. Thus roller rockers. I heard Rotella still has some. I use an additive from Lucas oil to replace the zinc for the flat lifters which is where most of your wear will occur. But that’s me.
1957. GMC F350
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