2000 Buick Lesabre geared up and bad gas mileage

2000 BUICK LESABRE
81,000 MILES • 6 CYL • FWD • AUTOMATIC
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LISABELL
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My car sounds like its running in low gear, at a high speed, yet the RPMs are not raised up. Since it has been running like this, my gas mileage has gone from 23 down to 18. What would cause this?
Nov 19, 2008 at 8:48 PM
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