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Mod | | | Forums66 Topics128,131 Posts1,056,372 Members48,441 | | 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: Feb 2011 Posts: 1,363 'Bolter | | 'Bolter Joined: Feb 2011 Posts: 1,363 | SAE 50 would be a bit too thick for an older non pressurized engine, SAE 30 is the best bet. I will not use a multi viscosity oil in older engines. And for that matter there are some engine manufactures that recommended against a multi viscosity oil.
Multi vis is good for brand new cars.
Multi vis oil the base oil is the low number like 10W-30 is a 10 weight oil, with viscosity index improvers to make it similar to a 30 weight at temperature. Remember lots of newer engines have such things as antifriction lifters etc and can handle the newer low vis oils with no EP additives.
Kicking self for selling off my Taskforce trucks.
Still looking for an LCF or conventional big bolt in decent shape.
As of 10-26-2022, A 55.2 Taskforce long bed now the work begins
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