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olds 330 fuel difference in octane

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Old August 10th, 2011, 11:54 PM
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olds 330 fuel difference in octane

330 LC 2 barrel. Has been running from the original owner for eyars with 87-89. Do you think if I fill it after she gets close to E with 93-94 it will make a big difference, what could I expect. Thanks for you insight.
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Old August 11th, 2011, 03:54 AM
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330 LC 2 barrel. Has been running from the original owner for eyars with 87-89. Do you think if I fill it after she gets close to E with 93-94 it will make a big difference, what could I expect
It will not make a big difference, and you can expect to spend more money on fuel. If properly tuned, 8.5 - 9.0 compression ratio cars will run on almost anything.
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Old August 11th, 2011, 04:05 AM
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Since it's a low compression motor, it should run on regular if properly set up and tuned.
Maybe not 87-regular, but certainly 89-regular. I can't see a reason to run it on more than 91, even if you want a margin of "safety."

Remember, these engines were not spec'ed to run retarded from the factory - they were supposed to run with a correct amount of advance, so advancing it more and using premium probably won't get you much , if anything.

- Eric
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