SPARK PLUGS, NGK VS MOTORCRAFT?

[Stanv03]

2020 mustang GT here, fully stock with a Roush catback. Will be getting a Roush CAI (without a tune, for now.) hopefully for this upcoming Black Friday sales. And maybe later on into next year some catted headers. But that will be it for the next few years since it is my only DD, What would be the best spark plugs for my car? I’ve seen people mention that NGK is really good, but others have said that motorcraft is best for a stock car? Or even slightly modified… so what shall I get? And maybe look into getting some new Coil packs as well?

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[ice445]

The Motorcraft's are NGK's so it doesn't matter. Although the new Motorcraft part number that supposedly supersedes the old plugs is the wrong heat range for a 2020 (I went through this debacle myself). You want the NGK 94862. LTR7CP13.
Ordering from this website ensures you won't get fakes.
https://www.sparkplugs.com/ngk-94862-ltr7cp13-laser-platinum-spark-plug

 

[robvas]

Leave the stock plugs and coil packs on the car

 

[Stanv03]

Leave the stock plugs and coil packs on the car

Well I feel like I’m due for the plugs, I’m around 56k miles and I have felt a little rough idle. I bought the car used back in 2022 but I don’t think they were ever changed out. Even the battery is still from factory.

 

[robvas]

Well I feel like I’m due for the plugs, I’m around 56k miles and I have felt a little rough idle. I bought the car used back in 2022 but I don’t think they were ever changed out. Even the battery is still from factory.

Take a couple out and look at them. They are more than likely fine and the plugs will last 100k+

But it's your money, if it helps you sleep better at night replace them!

 

[WItoTX]

Call or email OP Mustang. They will get you set right. I highly recommend them, Tim is incredibly helpful, even after the sale.

Don't mess around with anyone else, especially with items like this. I'm sure there are great companies, but there are tons of repeat customers on this site to OP. There is a reason for that.

 

[Angrey]

Whatever you choose, just buy from a reputable source. The knock offs are pretty difficult to spot. From the packaging to the actual plug itself. There's a special place in hell for Chinese counterfeiters.

 

[Stanv03]

Whatever you choose, just buy from a reputable source. The knock offs are pretty difficult to spot. From the packaging to the actual plug itself. There's a special place in hell for Chinese counterfeiters.

I’m planning on going with Cj pony parts

 

[K4fxd]

Go with sparkplugs.com They are the national distributor for NGK. Anywhere else and you can get counterfeits

 

[ORRadtech]

As someone suggested, I'd pull a couple and check them for wear and gap. In a stock engine they should easily last 100k+ miles. As for the coils, why would you replace them? Unless you're getting misfires you can directly relate to them, or they're damaged in some way, you're just spending money needlessly.

 

[WildHorse]

Here's your NGK stock number on a FACTORY Ford spark plug.

 

[txgt]

At 39K miles, my OEM plugs were worn anywhere from .054 to .060, so I decided to replace them. Now, granted I track my car and daily drive it so the spark plugs are going to wear faster than the mileage suggests.

I originally went with the 6509 plugs based on the NGK site's parts picker, but then later realized those were 1 heat range hotter than the LTR7CP13 plugs that originally came out of the car from Ford. I went back to the LTR7CP13 plugs and everything has been perfect.

So, I would suggest pulling your plugs, inspecting the gaps and replace with the exact same plugs based on their part numbers/markings.

 

[robvas]

You could have just closed the gaps a bit

I mean in your post you thought changing the diff fluid fixed your 1-2k rpm sluggishness and the also said the (first set you tried) plugs didn't change anything

 

[txgt]

You could have just closed the gaps a bit

Sure, could have done that, but decided to replace them. I still stand by that decision.

I mean in your post you thought changing the diff fluid fixed your 1-2k rpm sluggishness and the also said the (first set you tried) plugs didn't change anything

Not sure what this has to do with anything. Yes, the diff fluid change fixed the sluggish feeling I was experiencing.

I'm just trying to share my experiences with the OP that even though the mileage may not indicate an issue with your spark plugs, you really won't know unless you pull the plugs and inspect them and measure the gaps.

Also trying to pass on the information that using the parts finders on parts sites can potentially lead you to a different heat range spec than what the car originally came with.

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