Spark plugs - Scion iM Forum
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post #1 of 4 Old 07-21-2019, 03:49 PM Thread Starter
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Spark plugs

has anyone replace spark plugs yet? Our old spark plugs (SC20HR11) has been superseded by new spark plugs (SC16HR11). Just wondering if anyone noticed any difference.
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post #2 of 4 Old 07-22-2019, 03:44 PM
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has anyone replace spark plugs yet? Our old spark plugs (SC20HR11) has been superseded by new spark plugs (SC16HR11). Just wondering if anyone noticed any difference.
Not yet. 52000 miles and just checked a few weeks ago.
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post #3 of 4 Old 07-22-2019, 04:43 PM Thread Starter
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Not yet. 52000 miles and just checked a few weeks ago.
Thanks for the response... I am around 80,000 miles... I think the owners manual says 100K miles right?
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post #4 of 4 Old 07-25-2019, 06:40 PM
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I'm at 85 on my 2016. I've pulled the plugs on mine around 75k when I was doing compression tests with my labscope and checked them out. Honestly I would move up the interval a little to maybe 75 to 90. Theres a lot of carbon blow by past the porcelain which is a good indicator for plug wear. I'll be doing mine at 90 just because. I don't see an issue with waiting to 100 since my experience is anecdotal
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