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I have changed the spark plugs and the air.
1999 CHRYSLER 300
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
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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