2000 Buick Park Avenue Poor gas mileage

2000 BUICK PARK AVENUE
161,000 MILES • 6 CYL • FWD • AUTOMATIC
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2526487
  • MEMBER
  • 1 POST
Up until 2 months ago, my Buick Ultra averaged 29-31 MPG. Now it gets 24 mpg. No smoke from tailpipes is noticed. Plugs replaced. Engine runs smooth and accelerated well. No check engine light is on. Vehicle runs perfectly. Only gripe is reduced gas mileage.
Jul 16, 2009 at 11:29 AM
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JMALECKI
  • ✓Experienced Mechanic
  • 118 POSTS
Hello
Have you ever had the oxygen sensor replaced, if not you may want to start trere. It is recomended that the sensor be replace about every 50,000 miles over a period of time the sensor will slow down and become "lazy" and will cause poor fuel economy.

John
Jul 28, 2009 at 2:52 PM
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