2000 Buick Park Avenue Poor gas mileage

Tiny
2526487
  • MEMBER
  • 2000 BUICK PARK AVENUE
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 161,000 MILES
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.
Thursday, July 16th, 2009 AT 6:29 PM

1 Reply

Tiny
JMALECKI
  • 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
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Tuesday, July 28th, 2009 AT 9:52 PM

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