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Click on image for the lowdown. 
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| | | Forums66 Topics128,126 Posts1,056,356 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
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on the Internet for over 30 years! and not clogged down
with Ads!  Again, thanks!
| | | | Joined: Dec 2006 Posts: 1,154 Shop Shark | | Shop Shark Joined: Dec 2006 Posts: 1,154 | You are correct..Octane is a measurement value of combination of specific gasoline base additives. However there is not a substance with the nomenclature of...Octane. Octane it is the added sum of the hydro-carbon based gasoline components. Therefore it is used as a measured rating.
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