1999 CHRYSLER 300
133,000 MILES
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ANONYMOUS
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  • 1 POST
I have changed the spark plugs and the air filter. what more can i do to increase gas mileage
Nov 13, 2012 at 6:19 PM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.
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DRCRANKNWRENCH
  • CAR REPAIR CONTRIBUTOR
  • 3,380 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.
Nov 13, 2012 at 6:21 PM
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