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From: Gelato <gelato@.is.invalid>
Newsgroups: alt.home.repair,rec.autos.tech
Subject: Re: Spark plug cross reference table
Date: Tue, 28 Jan 2025 01:23:51 -0500
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On Tue, 28 Jan 2025 00:54:49 -0500, Clare Snyder wrote:

>>> It's not "my" vehicle but I found out what's in the owners manual which
>>> says only these will work NGK BKR5E-11, Denso K16PR-U11, Champion RC10YC4.
>>> 
>>> But the kid asked me if any others will work & that's why I asked here to
>>> find a cross reference table that will tell me if these will work also.
>>
>>Point taken. Please forgive me for being harsh with you.
>>
>>
>>> https://www.amazon.com/dp/B0D12LHZ6C Iridium Spark Plugs 2309
>>> https://www.amazon.com/dp/B0D7HMD65J BKR5EGP 7090 Double Iridium  
> 
>  total unknown quality / manufacturer. Your old ones may well be
> better - - - -

If iridium is good, double iridium must be twice as good, right?

As for the x-ref, I don't think they exist.

What you find is Champion will have their own x-ref to their plugs.
Then Bosch will have their own proprietary x-ref to their plugs.
NGK will have their own proprietary x-ref to their plugs too.

But there is no master cross reference out there.
That would be exactly what everyone would want. So it doesn't exist.