1997 Mercury Sable Poor gas mileage

1997 MERCURY SABLE
100,000 MILES • 6 CYL • FWD • AUTOMATIC
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B1XAFE64
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As earlier stated starts easy runs & idles nicely but seems to get bad gas mileage. (No leaks in gas tank) ha ha

I also have no messages - check engine or service messages on dash.

Just bought this used vehicle and I am trying to figure this problem.
Thanks
Mar 21, 2009 at 8:52 AM
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RENAUDTN
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If you're sure the car doesn't have good gas mileage (have you compared what's advertised for this car and what you actually get? Keep in mind that what’s advertised is ALWAYS higher than what you get in reality). Anyhow, if you’re sure, I suggest you get a tune up; at 100,000 miles, your spark plugs are due for a change and new plugs will increase your gas mileage. A mechanic could also look at your STFT (short term fuel trim) and LTFT (long term fuel trim) and find out if there’s something wrong with the car.
Mar 26, 2009 at 2:22 PM