| |
Click on image for the lowdown. 
====
| | | Forums66 Topics128,078 Posts1,056,035 Members48,433 | | 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: Sep 2001 Posts: 29,269 Bubba - Curmudgeon | | Bubba - Curmudgeon Joined: Sep 2001 Posts: 29,269 | "oil specs on 261"Multi-weight oils were available all years that 261 engine were available; and, in 1954, it looks like GM started to recommend multi-grade oil. This might have be due to the introduction of the high pressure engine but I bet it was due to the prevalence of high-quality multi-grade, detergent oils. | | |
|
|
| |
