5 Years ago I did my first maintenance at dealer after I purchase my Hyundai Sonata. 60k is a major maintenance window and I didn't want other shops to mess it up. Back then I know little about car so I just go with what the service manual says.
Half an hour later the service writer came in and recommend me to change PCV valve and my plugs. I agreed. He then asked what kind of plug I want. To save some money I select Platinum plugs. Jobs done and I drove home.
Today I think it's time to change these plugs to a better Iridium ones. I pull the coil off and put socket in. They are loose, very easy to get them off. Then the dealer's surprise come out:
Shocked, I tell ya! They upgrade my plugs to Iridium without telling & not charging me extra money!
And it's the same type as factory plug!
After just 34k miles these insulators are burnt like this, my factory plugs must give me all kind of misfire and engine codes! Thank you so much my
dear service writer and the dealership!!
*** NGK plugs are good. after 94k miles they still give consistent performance. I swap to Denso Iridium Power today. ***
Half an hour later the service writer came in and recommend me to change PCV valve and my plugs. I agreed. He then asked what kind of plug I want. To save some money I select Platinum plugs. Jobs done and I drove home.
Today I think it's time to change these plugs to a better Iridium ones. I pull the coil off and put socket in. They are loose, very easy to get them off. Then the dealer's surprise come out:
Shocked, I tell ya! They upgrade my plugs to Iridium without telling & not charging me extra money!
And it's the same type as factory plug!
After just 34k miles these insulators are burnt like this, my factory plugs must give me all kind of misfire and engine codes! Thank you so much my
dear service writer and the dealership!!
*** NGK plugs are good. after 94k miles they still give consistent performance. I swap to Denso Iridium Power today. ***