Spark Plugs question

[angelg1674]

This might be a dumb question but I know absolutely nothing about spark plugs. I have a 2015 v6 mustang and on fords oem list it shows that I need motorcraft sp-589 spark plugs, but those are copper, I want iridium. Will the sp-550 work fine or is that not made for the 2015 models? Also is aftermarket better or stick with motorcraft?

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[Linkster1666]

https://www.autozone.com/external-e...sch-double-iridium-spark-plug-9616/417839_0_0

Google is your friend, some of the time.

 

[angelg1674]

Thank you! Bosch is a good brand but I want to stick to motorcraft since it’s oem, and there lies my issue that google isn’t being my friend currently since I can’t find a clear answer if the sp-550 spark plugs will work. On the manual it says sp-589 but I don’t want copper if I can get iridium. My guess is they will work they’re just the iridium version but I want to make sure, It’s weird I think oreilys says will fit vehicle but autozone says it won’t

update: i think 550 is for ecoboost so sp-520 is what I’m looking for if oreily is correct, but now I’m debating if I should go with Bosch or autolite instead

 

[Linkster1666]

Try NGK's?

 

[SheepDog]

This might be a dumb question but I know absolutely nothing about spark plugs. I have a 2015 v6 mustang and on fords oem list it shows that I need motorcraft sp-589 spark plugs, but those are copper, I want iridium. Will the sp-550 work fine or is that not made for the 2015 models? Also is aftermarket better or stick with motorcraft?

NGK Makes both the Iridium and Ruthenium plugs for you car, as well as the OE equivalant platinum plug

 

[MiamiGT350]

@angelg1674 , if you want to roll with Iridium, just upgrade to the NGK plugs. Be sure to gap them properly.

NGK Makes both the Iridium and Ruthenium plugs for you car, as well as the OE equivalant platinum plug

 

[xcm77]

why don't you pull one spark plug out and google the code written on them? can't get more OEM then that

 

[angelg1674]

Thank you guys for the help! I’m leaning towards ngk now but the oem ones from motorcraft are 4.99 each and the ngk ones are 12.99 each, is it worth that price jump? I know iridium lasts longer but other than that are the claims of a performance boost true?

 

[WildHorse]

but other than that are the claims of a performance boost true?

Performance as in horsepower wise, false, as in longevity, true.

 

[angelg1674]

@angelg1674 , if you want to roll with Iridium, just upgrade to the NGK plugs. Be sure to gap them properly.

I think that’s what I’ll do thank you! Only thing is what do I need to gap it to for a 2015 mustang v6 with minor upgrades nothing crazy I don’t have a turbo or anything

 

[MiamiGT350]

It's in @SheepDog 's screenshot. 0.052" gap.

You can use the NGK site's Parts Finder by entering you vehicle: https://ngksparkplugs.com/en/part-finder

 

[Excelerater]

you ask for irridums then question the cost

Thank you guys for the help! I’m leaning towards ngk now but the oem ones from motorcraft are 4.99 each and the ngk ones are 12.99 each, is it worth that price jump? I know iridium lasts longer but other than that are the claims of a performance boost true?

Get the better plug,NGK....You only need 6 cry once.

 

[Basspro302]

Sp589 is platinum plugs, I can’t remember the last car ford made that used coppers

 

[ORRadtech]

Be very careful gapping iridium spark plugs.

 

[K4fxd]

I don't like the huge gaps. Not sure if the V6 uses the same plugs as the 5.0 or eco boost but I use the eco boost plugs. One step colder and come with a smaller gap.

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