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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, 01:41 PM
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Last edited by donkiboy; 04-18-2019 at 01:47 PM.
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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 04-19-2019, 10:26 PM
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You can lead a horse to water....
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Old 04-20-2019, 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 04-20-2019, 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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Old 05-17-2019, 10:47 AM
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Wondering if anyone's actually installed the NGK Ruthenium sparkplugs on our 3G TLs? Curious to know if they provide any noticeable difference in performance compared to the OEM NGK Iridiums.
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Old 05-18-2019, 08:17 AM
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Get the NGK iridium plugs. Worth every penny.
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Old 05-18-2019, 08:19 AM
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Originally Posted by CgyTypeS View Post
Wondering if anyone's actually installed the NGK Ruthenium sparkplugs on our 3G TLs? Curious to know if they provide any noticeable difference in performance compared to the OEM NGK Iridiums.
You wont be able to perceive a difference even if there was a difference...
so why spend the extra dough on something YOU wont ever notice?
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Old 05-18-2019, 09:36 AM
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Originally Posted by justnspace View Post
You wont be able to perceive a difference even if there was a difference...
so why spend the extra dough on something YOU wont ever notice?
I've been participating on automotive related boards for 20 years now; one truth I've discovered is folks who buy "upgraded" spark plugs can ALWAYS tell how much better they are compared to the OEM plugs. They will post glowing reviews full of hyperbole to describe the difference, all the while the rest of us are shaking our heads and laughing at them.
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Old 05-18-2019, 10:56 AM
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Originally Posted by justnspace View Post
You wont be able to perceive a difference even if there was a difference...
so why spend the extra dough on something YOU wont ever notice?
Negative, Ghost Rider, the ever reliable butt dyno will report fantastic gains!!
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Old 05-18-2019, 11:04 AM
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I was fooled once...bought performance gauge spark plug wires for my 2000 Toyota Corolla

the only difference I could tell was the color. a bright blue instead of the OEM black
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Old 05-19-2019, 01:21 AM
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Ha, good one, guys. I shall stick to OEM NGKs....but got a while before I need to change anyways. Car is only at 73,600 miles
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Old 05-19-2019, 02:13 AM
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Originally Posted by justnspace View Post
I was fooled once...bought performance gauge spark plug wires for my 2000 Toyota Corolla

the only difference I could tell was the color. a bright blue instead of the OEM black

I didn't know you were originally a slow crab...
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Old 05-19-2019, 06:46 AM
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Originally Posted by Midnight Mystery View Post
I didn't know you were originally a slow crab...
of course, we all have to start somewhere.
my first car was a '89 Mazda MX-6!
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Old 05-20-2019, 11:44 AM
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Originally Posted by justnspace View Post
I was fooled once...bought performance gauge spark plug wires for my 2000 Toyota Corolla

the only difference I could tell was the color. a bright blue instead of the OEM black

Did you feel the Vtec kick with the performance wire? lol


some how you confused a G35 RDW with a FWD TL... nice story how you got into the 3g TL.
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Old 05-21-2019, 12:35 PM
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The back 3 plugs are hard to get to, so I suggest you use OEM NGK plugs if you don't want any issues.
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Old 05-21-2019, 01:34 PM
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Is spark plug replacement really needed every 100k miles? Would I be wrong to assume that this can be stretched to well beyond 100k miles?
Assuming that gaps are within spec and there are no issues related to gas mileage or engine performance.
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Old 05-21-2019, 01:45 PM
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From my experience you can stretch them especially if you drive a lot of highway miles but you need to check if they are still tight. When I checked my sparkplugs at 210k miles they looked just fine but 2 out of 6 were pretty loose. So I suggest you at least check it they are tight.
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Old 05-21-2019, 01:50 PM
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Hey donkiboy…...I just went back and read your earlier message. $140K? you already got your money's worth out of those sparkplugs......it's time to replace them or as a minimum check if they are still tight. I replaced mine at 110K and 220K.
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