premium vs. regular pump gas - Page 2 - 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 11-24-2005, 01:35 PM   #11
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Quote:
Originally Posted by its840
i have a series II and on my fuel door it says "USE PREMIUM UNLEADED ONLY".
X2

In fact from my owners manual
Quote
If you have a 3800 Supercharged engine (VIN Code 1), use premium unleaded gasoline rated at 91 octane or higher. With the 3800 Supercharged engine, in an emergency, you may be able to use a lower octane -- as low as 87 -- if heavy knocking does not occur. If you are using 91 or higher octane unleaded gasoline and you still hear heavy knocking, your engine needs service.
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Old 11-24-2005, 01:47 PM   #12
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X3
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Old 11-24-2005, 02:14 PM   #13
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"I cant remember what the "pinging" is, but if i remember right, it wont hurt your car."

Since "pinging" is in fact the cylinder walls vibrating from detonation, I strongly disagree.

If it says use premium, use premium. Pinging, even a little, is death for supercharged engines.
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Old 11-24-2005, 09:46 PM   #14
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ya i dont get very impresive fuel milage from my car (twin to yours) aswell....however i know that its only because i have a VERY heavy foot!!

P.*. I use primium only (like it says on the dash under the fuel gauge!
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Old 11-24-2005, 09:56 PM   #15
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x4 Says in my manual to use premium as well as the fuel door.
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Old 11-24-2005, 10:21 PM   #16
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On 95 SLE'* factory supercharged the fuel door states "Use Unleaded Fuel Only" and on the dash it just says Unleaded Fuel Only.

Owner'* manual should read the same as any 1995 SSEi owner manual.
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