Question about 1999 Oldsmobile Aurora

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Hi all, my olds 2001 aurora runs great. i'm due for a tranny fluid change next month, but i've been good in keeping her in great running shape. my problem is that my gas mileage has depreciated immensely over the past couple of months. i used to avereage 11, 12, or 13 L per 100km, but now i'm in the high teens for every 100km driven. all instruments are reading fine no check engine light is on so i'm wondering if anyone out there knows what might be the issue. thanks

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  • pf4evr Oct 03, 2009

    tire pressure is fine. i do a check on all my basic fluids and the tires every Saturday, but I'll have the shop check the sensors, plugs and caps, and the gas filter when i go in to change the tranny fluid and filter...thanks for your suggestion.


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Check obvious things like tire pressure. Make sure there is nothing binding, like brakes, wheel bearings, etc. Look at fuel mixture - it would really help to put a scan tool on and look at fuel trims and O2 sensor readings.

Posted on Oct 03, 2009

Testimonial: "thanks for the suggestion. will let you know what the verdict is and any improvements after my visit to the shop"

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