JT Si
Senior Member
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- #1
Has anyone seen any real world results of these new spark plugs? My other car is due for spark plugs, so I looked up the NGK plugs to find these. Outside of their own marketed testing, I can't find any real comparison of them vs. iridium, platinum, or conventional copper plugs.
They don't list a Ruthenium HX part for the L15, so I found a model that has identical specs to the OEM ILZKAR8J8SY Si plug except the gap is 0.031" instead of 0.030". I verified with NGK these are usable for our application. I may regap them but NGK suggested to use them as gapped due to the very small difference.
I ordered a set for the Si along with my other vehicle for kicks - there have been some interesting claims on other car forums that could absolutely be attributed to simply replacing an old plug with a new one. I've only got about 6,000 miles so the factory plugs should still be in excellent condition.
I don't have access to a dyno or any other objective comparison tools so I'll post a subjective comparison this weekend when I swap the plugs out.
I wonder how higher ignitability might affect the system as a whole?
Edit: forgot the marketing materials.
They don't list a Ruthenium HX part for the L15, so I found a model that has identical specs to the OEM ILZKAR8J8SY Si plug except the gap is 0.031" instead of 0.030". I verified with NGK these are usable for our application. I may regap them but NGK suggested to use them as gapped due to the very small difference.
I ordered a set for the Si along with my other vehicle for kicks - there have been some interesting claims on other car forums that could absolutely be attributed to simply replacing an old plug with a new one. I've only got about 6,000 miles so the factory plugs should still be in excellent condition.
I don't have access to a dyno or any other objective comparison tools so I'll post a subjective comparison this weekend when I swap the plugs out.
I wonder how higher ignitability might affect the system as a whole?
Edit: forgot the marketing materials.
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