only 13 MPG? what!? - 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 09-29-2008, 04:12 PM   #11
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i'm located in Utica, Michigan... are regular AC Delco plugs ok?
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Old 09-29-2008, 04:16 PM   #12
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Here'* what I use
INTENSE-Racing.com: Autolite® Copper Core Spark Plugs

Close to me, but we have a small lake between us. Wish I could help you.
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Old 10-24-2008, 06:27 PM   #13
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update...she'* still getting only 13 mpg. i told nichole to run premium only and that hasn't helped much. i also ran a bottle of injector cleaner through the car and nothing. i plan to check the plugs this weekend. how do i get to the oxygen sensors? how expensive are they?
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Old 10-27-2008, 05:46 PM   #14
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well hold up a second do you know if you engine is a high compression engine if it is then you should be getting better gas milage with higher grade. believe it or not higher grade fuels burn slower then the lower grade fuels
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