These are out of my kids 2018 Kia Sportage with 88,000 miles on it. It has been burning about a quart of oil every 1,500 miles or so. That has slowed way down with the HPL EC cleaning to about 1/2 quart every 2,000 miles. It’s been running rough so I did a CRC DI spray cleaning and changed the plugs. It’s running much smoother now. I replaced these stock plugs with the NGK Iridium IX plugs.
The burning on the ceramic is what makes me question them?
The burning on the ceramic is what makes me question them?
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