Question about 2000 Chevrolet Metro

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I have a 2000 lsi sedan 4cyl runs excellent good compression mileage has got considerably worse down to 22 hwy any ideas

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*Oil change.
*Accurate tire pressure. (highway drivers experience better MPG with tire pressure 2-3 pounds higher than whats called for on tires)
*Tune up/spark plugs
*Injectors clearer/replacement. STP injector cleaner
Bad fuel/low grade/gas supplier might be bad. Try new gas station

Posted on Mar 30, 2011

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Please let me know and I'll try to help,
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