What was the high octane rating for auto fuel in 1977 and was this unleaded?
Pretty much the same as today as far as available octane ratings. 87 to 91 is pretty standard, but certain stations in certain regions might have as low as 85, or as high as 92 or 93 or even higher.
http://en.wikipedia.org/wiki/Octane_rating#Regional_variations
Way back when, higher octane used to be called Ethyl.
http://en.wikipedia.org/wiki/Ethyl_Corporation
It made for some good dirty jokes about "pumping Ethel".
Unleaded gas was phased in fairly rapidly starting in 1973.
http://en.wikipedia.org/wiki/Unleaded_gasoline#Lead
n
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dont think high octane was around back then only super n unleaded wasnt around
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Sunoco 260 was the highest octane available on the street. 104 Octane. It was not unleaded. The only unleaded gas available at that time was sold by Amoco.
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Pretty much the same as today as far as available octane ratings. 87 to 91 is pretty standard, but certain stations in certain regions might have as low as 85, or as high as 92 or 93 or even higher.
http://en.wikipedia.org/wiki/Octane_rating#Regional_variations
Way back when, higher octane used to be called Ethyl.
http://en.wikipedia.org/wiki/Ethyl_Corporation
It made for some good dirty jokes about "pumping Ethel".
Unleaded gas was phased in fairly rapidly starting in 1973.
http://en.wikipedia.org/wiki/Unleaded_gasoline#Lead
References :
ASE Certified Tech
105 octane. Chevron had it and it was leaded fuel. It was labeled as the Custom grade.
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I worked for them in 1972