Changing spark plug for better gas mileage?

I recently read in a magazine (not a car magazine) a list of things to do to increase gas mileage. On the list was changing your spark plug. Is this true? Or is it so small as to be insignificant?|||that%26#039;s the main part of it ,that%26#039;s what determines how much fire gets to the cylinder to make it burn the gas,if the plugs are old and worn out the gas mileage is going to be way down,the gap in them will get father apart and cause it to loose gas mileage real bad, and also power,adding new plugs to one can only help it not hurt it,and they usually pay for them self in the savings on the amount of gas you,ll save,good luck.|||your welcome.

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|||it is true but only if your spark plugs are worn out. If they are still good then there is no point.|||It will help! its part of keeping your motor running well, and a motor that runs well keeps your fuel mileage from dropping|||it%26#039;s not that small of a thing. i usually put in bosch when i change mine and they last a little longer for me, or they did in my ford, but now i have a dodge.|||Carbons build up on the plugs electrodes over time. This prevents the plugs from performing their best. It is just a small amount but it makes a difference. If you want to spend the money you can replace your plugs with some platinum ones. Platinum plugs burn hotter and cleaner.|||Only put in the OEM recommended plugs. Different makes of vehicles use different temperature ratings on their plugs. Sometimes you can get a very mild increase in mpg by spending lots of money on high end specialty plugs, but the cost generally outweighs the benefit.


Use the OEM recommended plugs, and only change them at manufacturer recommended intervals unless they go bad.|||when plugs gets alot of miles on them, they get weak and dont fire as good and when that happens, you burn raw gas, which in turns you use more gas to get where your going.thats why you need to change the plugs when it calls for.|||changing ur spark plugs is the best to do for your gas mileage,, changing ur air filter or keeping it clean @ all times too. also keep the right air pressure in your tires and check your PCV valve and make sure your Oxygen sensors are ok and your service engine light its not ON.