I want to change my car spark plug and bought NGK ILKAR7B11 Iridium spark plugs that was suggested for my Toyota Corolla 2012. As everyone suggests to check for the gap, I checked with feeler gauge and it was around 1.01mm instead of 1.1mm. I could see from google search/reviews that it was pre-gapped and can be used straightaway. However I'm seeing some difference when I measure with feeler gauge.
Had anyone had similar experience with NGK Iridium plugs?
Thanks in advance.