Benefits of changing spark plugs

The role of spark plugs in a car engine is hard to overestimate. If they fail, the engine simply will not start. Even if one of the spark plugs deteriorates, you will immediately feel it – after all, one cylinder will not work at all. Moreover, exceeding the limit of their resource, these important elements of the ignition system can cause enormous damage to the car engine.

So for example, cars that are equipped with a catalyst can quickly fail. After all, the spent spark plugs do not completely burn the fuel-air mixture, which burns out in the catalyst. This leads to a reduction in the service life of the part, the replacement of which will be more expensive than the installation of new spark plugs set. And this is just one of many reasons to replace the spark plugs in time.

I’ve already reviewed best spark plugs for Dodge, Vortec engine, Honda & nice article about the difference between iridium/platinum/cooper plugs. 

In addition to this, a timely replacement of spark plugs has many other advantages:

  • Fuel economy – a worn spark plug can increase fuel consumption by almost a third.
  • Smooth start of the car – replace your spark plug and your car will start without any problem.
  • Consistent combustion system – spark plugs allow for the constant production of combustion that leaves your vehicle’s system running the way that it should.
  • Emission reduction

And by replacing ordinary spark plugs with iridium ones, you can achieve the following advantages:

  1. Iridium spark plugs increase engine power by 3 – 4%;
  2. The engine starts easier at low temperatures;
  3. Reduced fuel consumption reaches 2 – 7%;
  4. An increase in the life of spark plugs by 2 to 3 times;

Despite the fact that iridium spark plugs are quite expensive, but after 40,000 miles, thanks to fuel economy, they will necessarily pay for themselves.

So replacing spark plugs after a mileage of 30,000 miles for ordinary spark plugs and 70,000–80,000 for iridium, you will not only save your money but also increase the reliability of the car.

Used resources: Guide to Spark Plugs Materials on

Liam Brooks,

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