grade of fuel for n/a - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 04-12-2004, 05:08 PM   #1
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Default grade of fuel for n/a

I know that the super charged engines are suppose to use premium fuel..but what about the n/a can we use any grade of fuel..or would the cheap fule be bad on our cars and would the premium be a waste of money?
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Old 04-12-2004, 05:11 PM   #2
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Should be fine with 87. Older engines may run better with 89, due to carbon buildup causing effective compression ratio increase and other possible wear related knocking.
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Old 04-12-2004, 05:13 PM   #3
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thanks for replying n/a does mean none supercharged right? I have a 94 SE
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Old 04-12-2004, 05:13 PM   #4
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89 or 93 is just lovely for your car.
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Old 04-12-2004, 05:14 PM   #5
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Naturally Aspirated
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Old 04-12-2004, 05:23 PM   #6
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Quote:
Originally Posted by ssesc93
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That means non-supercharged, yes.
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Old 04-12-2004, 06:13 PM   #7
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This is what I meant to do, I thought I did at least


Quote:
Originally Posted by 95neongirl
thanks for replying n/a does mean none supercharged right? I have a 94 SE
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Old 04-12-2004, 08:39 PM   #8
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does higher octane promote pre dentation on n/a motors
by the way i run 87 all the time
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Old 04-12-2004, 09:34 PM   #9
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No it doesnt Gameover.
If your engine is not pinging or knocking when going up hill or idling then the 87 is fine.

On your next fill go for the premium 94 or so. Do you notice a difference in performance? Does the fuel economy out wiegh the added cost?
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Old 04-12-2004, 09:41 PM   #10
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higher octane is a waste for me
i wont go higher because the manufactor doesnt state it
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