I have changed the spark plugs and the air.

Tiny
ANONYMOUS
  • 1999 CHRYSLER 300
  • 133,000 MILES

I have changed the spark plugs and the air filter. What more can I do to increase gas mileage

Tuesday, November 13th, 2012 AT 6:19 PM

1 Reply

Tiny
DRCRANKNWRENCH
  • EXPERT
  • 3,456 POSTS

Change all the oxygen sensors as they determine how much gas is sent into the engine. Old oxygenb sensors can make a car run rich and therefore not get as good a gas mileage.

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Tuesday, November 13th, 2012 AT 6:21 PM

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