Really? Isn't 5-6T kms too frequent? ...
For newer cars with modern engines, you can't really say the difference between a regular spark plug compared to an expensive one.
You just need to clean them every 5k and change them every 10k. Like in my case usually copper core conventional spark plugs lang nagamit ko dati.
One of the reasons why platinum or iridium plugs are used is because of longer service life. A lot of newer cars takes time to replace the spark plugs. The labor in most cases outweigh the cost of the plugs. I remember when I used to work at a dealership shop, a customer wanted a minor tune-up for a 1990 Cadillac with Northstar V8 and he wanted it done while he waits, I gave his keys back and asked him to bring it back when it's convenient fo him without me burning my arms to replace the plugs on the firewall side. It all depends what car you intend to replace plugs.
Last edited by jick.cejoco; May 24th, 2018 at 05:49 AM.