Spark plug cross reference table

Take a look at RockAuto at

Rock Auto is very reputable, etc

Almost any 5/8" spark plug will fit. Doesn't mean it's the right spark plug for your car in your environment.

Every size of spark plugs comes in a multiplicity of heat ranges. Plugs too cold ---> fouled cruddy plugs, incomplete combustion. Plugs too hot ---> burned electrodes, burned valves, piston damage.

The first thing you should have done was read your owner's manual and see what the mfr recommends for your climate. Manuals are available online.

RTFM before asking the ignoratti. I can't believe no one gave you a sensible answer.

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.

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.

That was what my observation is, which is that Brand X will have a cross reference specific only for Brand X spark plugs.

That is, there is no "real" cross reference that I know of for spark plugs.

What I find strange is that this one thing everyone wants, doesn't exist.

All I can find are companies claiming that a given list of other spark plug model numbers fits their particular spark plug brand and model number.

I use that site for all sorts of car parts. I check at manufacturer/distributor websites to confirm a part is a real match before buying though.