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Super Shell fuel additive promises top engine performance
Shell explains how carburetor anti ice and a suite of additives raise power and efficiency. TCP boosts power and plug life, cat cracked gasoline improves Octane, Alkylate reduces knocks, anti knock mix stabilizes combustion, butane aids cold starts, Pentane speeds warm ups, gum prevention keeps carburetors clean, Platformate boosts energy output, all claimed to yield better mileage and smoother starts.
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Super Shell
Jimmy Doolittle
Shell