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If they were real dirty, yes.

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17y ago

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Will changing spark plugs help fuel mileage?

Only if there's something wrong with your old spark plugs.


If you replace the spark plugs will it make a car faster?

Changing your spark plugs could theoretically make your car faster but not enough to make a noticeable difference. Changing your spark plugs when they are worn will increase your fuel mileage slightly.


What is the mileage of spark plugs?

you can get upto 100,000 miles on a set of plugs


Will new spark plugs make my gas mileage better?

Yes, new spark plugs can improve your gas mileage if the old ones are worn or faulty. Fresh spark plugs ensure better combustion by igniting the air-fuel mixture more efficiently, leading to improved engine performance and fuel economy. However, the overall impact on mileage will also depend on other factors like driving habits, vehicle condition, and maintenance. Regular maintenance, including replacing spark plugs, can help optimize fuel efficiency.


Changing spark plugs 2005 Mitsubishi endeavor and what brand of spark plugs are recommended?

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Why 30000 mile dodge ram hemi spark plug changes?

As the plugs wear, the gap increases and the spark fades, resulting it poor ignition eventually. This simply means reduced gas mileage. I have 60000 miles on my stock plugs with no reduction in gas mileage, but I plan on changing them real soon...


Why ford explorer won't start after changing spark plugs?

Obviously- the spark plugs were not the issue :)


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Can bad spark plugs affect gas mileage?

Yes.Yes.


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