47-55.1 leaded fuel/ octane? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

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47-55.1 leaded fuel/ octane?

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08-25-2019, 09:32 PM	#1
1948ChevyDumpFixer Registered User Join Date: Aug 2019 Location: NC Posts: 30	leaded fuel/ octane? I'm pretty sure I have the original engine in my '48. I dont have any of the history yet to know if its ever been rebuilt. How important is a lead additive and octane to the longevity of these inline 6 engines? I have access to 100LL (100 Octane, Low Lead) at my local airport (no ethanol) so I was thinking that this might be a good idea for my truck for as little as it gets driven.

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