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Click on image for the lowdown. 
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| | | Forums66 Topics128,083 Posts1,055,967 Members48,430 | | 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: Jul 2005 Posts: 640 Shop Shark | | Shop Shark Joined: Jul 2005 Posts: 640 | Like 4onthefloor says, you're just wasting your hard earned money by putting anything but 87 octane in your tank. All the higher octane fuel does is resist detonation for awhile, so it MAY be affecting your timing a small amount. | | |
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