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o2 sensor

  1. Help! Mileage imploded!

    New Member Introductions
    Hi y'alls, hope someone can help here. I have an '04 xB, 88,000 miles [purple, hence the name]. I used to get 35 mpg per tank all the time. Then about 6 months ago I started getting less than 30. I replaced tires, corrected air pressure, got them aligned, changed air and gas filters - no...
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