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Are Expensive Spark Plugs Worth It?

 
Old 03-27-2019, 04:32 PM
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Are Expensive Spark Plugs Worth It?

Is it worth it to buy $13.49 plugs (Denso Iridium LL) or am I fine with the $3.59 ones (Denso Platinum TT)???

My 2006 TL 6MT is throwing some misfire codes at me. As I test for which one(s) of the coil packs is bad, I'm going to replace the factory spark plugs as well. I'm going to stick with Denso plugs, since I've read a lot on here about sticking with Denso/Hitachi coil packs. Plus I'm weird and I like matching brands as much as possible.

Which plugs do you all roll with?
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Old 03-27-2019, 04:38 PM
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OEM plugs are NGK Iridium actually and I'd stick with those..
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Old 03-27-2019, 07:42 PM
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If you choose to deviate, ensure you are getting a plug in the same heat range, with the correct gap.

Or put down your nerd textbook and just buy the same plugs the car came with.

The advantage to iridium is the life span. Don't gap them or check the gap.
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Old 03-27-2019, 07:53 PM
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Originally Posted by jaybo19 View Post
. Plus I'm weird and I like matching brands as much as possible.

Which plugs do you all roll with?
I glossed over this earlier..

You should buy Acura-branded/ marked up OEM plugs if you were truly 'weird' then


I mean, you drive an Acura, not a Denso car
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Old 03-27-2019, 08:26 PM
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They have the new Ruthenium plugs for our cars:

Ruthenium HX

someone said they are cheaper than the iridums for our cars.
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Old 03-27-2019, 08:50 PM
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Ruthenium?? Hehe, I thought that link would be to an Onion article

1. You can get the NGK Iridium 6994s on sale for ~$56.
2. How much is ~$56 when they last 105K miles / 7 years? Is $8/year too much for you to spend?
3. I've pulled 2 sets of NGK 6994s out of my TL after 105K miles each and they all still had the factory gap. I think these plugs could easily go 150K miles.
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Old 03-28-2019, 01:08 PM
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expensive plugs are over rated... just buy the .99 cent at your local Walmart.....
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Old 04-18-2019, 12:51 PM
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Originally Posted by thoiboi View Post
OEM plugs are NGK Iridium actually and I'd stick with those..
Are these the OEM ones?

Amazon Amazon
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Old 04-18-2019, 12:54 PM
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Originally Posted by donkiboy View Post
Yes

but make sure you get 6, that's a 4 pack.
https://www.oemacuraparts.com/v-2007...oil-spark-plug

You can confirm the part number here
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Old 04-18-2019, 04:38 PM
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Originally Posted by donkiboy View Post
Any reason why not go for Denso for less money? Is it due to Denso not lasting as long as NGK?
Originally Posted by thoiboi View Post
OEM plugs are NGK Iridium actually and I'd stick with those..
Everybody's reason ^^^, shit who knows if the Denso ones last longer or not, we'd still buy the OEM ones.

Last edited by guitarplayer16; 04-18-2019 at 04:41 PM.
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Old 04-18-2019, 04:55 PM
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It's a few dollars difference for 6 plugs that last 100K miles


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Old Yesterday, 10:26 PM
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You can lead a horse to water....
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Old Today, 11:15 AM
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If the OEM plugs are iridium, then chances are that I don't need to replace them yet? I've got 140K miles on my '06. I've no issues with rough idling and gas mileage is unaffected.
However it's been feeling sluggish ever so slowly over the years.
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Old Today, 12:55 PM
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At 140K on a set of iridiums? I would probably replace them soon, but don't expect that to resolve the "sluggish" feeling (the butt dyno is notoriously inaccurate, even for the best butts).

If they are iridiums and you replace them, check the gaps on them. I'd be interested to learn what the gaps are at after 140K miles.
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