I have used regular "87" octane gas in my 1993 Buick Roadmaster for 7 years and it runs like a top. I don't know the gas mileage as my odometer doesn't work, but it seems to be OK.
No, 87 octane is sufficient
87 the de-tuned LT1 will not run as efficiently on higher grade fuel
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The Buick Roadmaster was not produced in 1986. They were made from 1991 to 1996.
yes they will fit easily with no rub or lift needed, i have a 94 model roadmaster with 24's on it and they fit perfectly.
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The Buick Roadmaster was manufactured by the Buick division of General Motors. They were produced between 1936 and 1957 and then reproduced between 1991 and 1996.
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