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Mod | | | Forums66 Topics128,157 Posts1,056,894 Members48,458 | | 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: May 2001 Posts: 1,907 'Bolter | | 'Bolter Joined: May 2001 Posts: 1,907 | I've noticed that the Delo 400 for my Dodge diesel is sold like this. The same is true for the Rotella T, I think.
Conventional - 15W-40
Synthetic blend - 10W-40
Full synthetic - 5W-40
This tells me that the synthetic is a better lubricant even at lower viscosities. I use the full synthetic, even in the summer. Hope I'm not making a mistake.
1948 3/4-Ton 5-Window Flatbed Chevrolet 34 Years. Now with a '61 261, 848 head, Rochester Monojet carb, SM420 4-speed, 4.10 rear, dual reservoir MC, Bendix up front, 235/85R16 tires, 12-volt w/alternator, electric wipers and a modern radio in the glove box.
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