If they were real dirty, yes.
Only if there's something wrong with your old spark plugs.
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.
you can get upto 100,000 miles on a set of plugs
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.
NGK platinum plugs
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...
Obviously- the spark plugs were not the issue :)
Yes, particularly if they are old and cracked. New wires will deliver a better spark to the plugs. FriPilot
Yes.Yes.
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Changing spark plugs can be an easy task. Disconnect the battery and the spark plug cables, remove the old spark plugs, replace with the new spark plugs, connect the spark plug cables and the battery.
Changing spark plugs is an important task. To do this, disconnect the battery and spark plug cables, and remove the old spark plugs. Next put in the new spark plugs, and reconnect the spark plug cables and then the battery.