Having problems with your 2005 Mazda 3 ?

Decreased fuel efficency - 2005 Mazda 3

Posted / edited by AnonymousUser on : 17-09-2018

Answers :

The basic things to do first is to make certain that your air filter is clean. You should replace your air filter at least every 12,000 miles or sooner depending on where you live. A better solution is a permanent air filter. A popular one is made by K&M and it just needs to be cleaned once or twice a year. Also, air flow is better with these filters so it could increase your gas mileage.
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\015\012Spark plugs and wires are important, especially if you have over 50,000 miles on some on the newer cars (they rarely last the 100,000 miles they promise).
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\015\012If you're using ethanol type fuel (you probably are), you'll notice a considerable drop in gas mileage. My minivan went from about 22 miles per gallon in the city to 17. The highway mileage went from about 28 to 24. Just from the change in fuel.
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\015\012Other problems are best diagnosed by a knowledgable mechanic. There could be a leak in a vacuum line, time to replace the oxygen sensor (about 100,000 mile life), a malfunctioning sensor...and so on. The car's computer usually, but not always catches most of those.
Repair Help & Product Troubleshooting for 2005 Mazda 3

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