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Old 01-23-2024, 02:32 AM
Baron Von Zeppelin Baron Von Zeppelin is offline
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All the GTO's with "rated 10.75" compression ratio specified 100 octane minimum ..
By the old octane rating method.

Today's 93 is equivalent to that.
Google will probably have a comparison factored between now and then.

Alcohol mixtures of today aren't doing us any favors though

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Old 01-23-2024, 06:51 PM
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geeteeohguy geeteeohguy is offline
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Originally Posted by Baron Von Zeppelin View Post
All the GTO's with "rated 10.75" compression ratio specified 100 octane minimum ..
By the old octane rating method.

Today's 93 is equivalent to that.
Google will probably have a comparison factored between now and then.

Alcohol mixtures of today aren't doing us any favors though
I respectfully disagree. At least with our California formulas. We have only 91 gasahol, and it is nowhere near adequate for a stock pre-'71 GTO engine. The last stuff we had that mine would run on and not complain much was the 94 octane low lead in the early '80's.

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Old 01-23-2024, 10:23 PM
bluejudge bluejudge is offline
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Quote:
Originally Posted by Baron Von Zeppelin View Post
All the GTO's with "rated 10.75" compression ratio specified 100 octane minimum ..
By the old octane rating method.

Today's 93 is equivalent to that.
Google will probably have a comparison factored between now and then.

Alcohol mixtures of today aren't doing us any favors though
Ok so if the new rating of 93 equals the old rating of 100 then I guess today’s gas is decent for the octane, it’s just missing the lead. Thanks, good to know. Thanks, Marc.

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Old 01-24-2024, 02:45 PM
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geeteeohguy geeteeohguy is offline
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Ok so if the new rating of 93 equals the old rating of 100 then I guess today’s gas is decent for the octane, it’s just missing the lead. Thanks, good to know. Thanks, Marc.
Good luck with that.

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