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Quote:
Originally Posted by DHZIEMAN
Something of interest, in the mid 1920's octane of fuels ranged from 40 to 60 Octane and big improvements did not show up till later and then much more during WWII.
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One more thing, octane is the measure of how much compression a fuel can withstand before igniting. Or, in layman’s terms, the higher the octane rating, the less likely the fuel is going to pre-ignite (read: explode unexpectedly) at higher pressures and damage your engine. That’s why performance cars with higher compression engines require higher octane (premium) fuel. The Model A (even with a high compression head) is no where near the engine compression that higher octane gas was designed to protect.
Which goes to prove, use the lowest grade (cheapest price) and be happy.