problem with gas mileage
I have a 2007 chrysler that uses an excessive amount
of gas. it never did this before. it will use a quarter
tank of gas in 10 miles. what could be wrong?
If you've checked for leaks and there isn't any I would think maybe the O2 sensor could be bad, but I would you should be showing a check engine light on the dash with an O2 sensor code . I would go to murrays or autozone and have them plug in a code reader for free and see if anything comes up.
the above answer os obvius, have your sensors changed, all 3 off them, all of your spark plugs + filter+ oil change. For further extra fuel milage put a cold air filter inatke on your car , should give you further 5-10% extra milage+5-8% extra horsepower. Add Millitec or similar friction reducing additive to your motor oil, should give you further 5-8% millage+ at least 5% more horsepower.. Hope this is useful, Regards from Reykjavik, Iceland
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