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2007 Kia Spectra Question: What can cause decreased gas mileage



Linda123, 2.0L 4 Cylinder, Shelton, WA, November 03, 2009, 08:12

I have a significant decrease in my gas mileage. There is no leak.

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  • Answer #1

    matte November 03, 2009, 09:23

    Is your check engine light on? I've had the same experience with another car, and it happened when the check engine light was on--the problem was a failed thermostat. i needed a shop to diagnose it.

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