One of these things is not like the other!

Your spark plugs are what supply the spark that ignites the air to fuel mixture, creating the conduction which makes your engine run.
Notice your car or truck is a little harder to start? Idling rough with a loud engine? Gas mileage has decreased?
These are all signs your spark plugs may need to be replaced!

Which plug do you think would keep a vehicle running smoothly?

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