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Old 02-08-2013, 01:30 AM #1
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NGK Sparkplugs: Are the Laser Iridiums worth the extra cents over the Iridium IX?

After just turning 115,100 miles on my V8 earlier this week, I figure I should start thinking about spark plugs soon. Are the NGK Laser Iridiums worth the extra $.35 each over the NGK Iridum IX? I haven't searched too deeply on pricing yet. I have checked Rock Auto and the prices are as follows:

NGK Part # 3764 {#3540, BKR6EIX11, BKR6EVX11} Iridium IX $6.09
More Information for NGK 3764

NGK Part # 4589 {#IFR6T11} Laser Iridium $6.45
More Information for NGK 4589

Also, NGK boasts about their strong corrosion resistance and how applying anti-seize is not necessary, do people still choose to use anti-seize? If so, what kind?

Thanks.
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Old 02-08-2013, 08:30 AM #2
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I replaced my plugs a few months ago with lasers. I noticed stronger/smoother pull at higher rpm. And yes do use anti seize shouldn't matter what kind you get. A then cost a few bucks.
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Old 02-08-2013, 09:25 AM #3
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The ONLY advantage Platinum or Iridium has over standard copper plugs is longevity. I too see a difference when I change my plugs. That's because the older plugs weren't performing as well as they should.

If there was even a chance for a .1% increase in performance then every professional race car on the planet would be using them. And they don't. They use standard copper plugs. They replace them before each race. They're NOT looking for longevity...just performance. And the standard copper plugs give them all the performance that's possible. So it's not worth it for them to use Platinum or Iridium plugs.

Some vehicles - you can only get Iridium plugs for (wifes Lexus ES-350). That's a good thing. Those rear plugs are a royal pain to replace.
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Old 02-08-2013, 10:20 AM #4
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Just buy the denzos from the dealer they are cheaper and its what the owners manual recommends. You will get back lost power with any plug so don't believe all the hype about better plugs make you faster or save you fuel. Im gettin 21mpg with oem plugs from the dealer. Yes, I used a lil bit of anti seize, the dealer gave me a small packet!
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Old 02-08-2013, 07:28 PM #5
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Quote:
Just buy the denzos from the dealer they are cheaper and its what the owners manual recommends.
CHEAPER??? You must have a discount dealer near you. The Denso plugs from the dealer are 4-5 times the price I can buy the EXACT SAME DENSO plug from my local parts store. The 3 Toyota dealers near me sell them for $21-EACH.
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Old 02-08-2013, 09:11 PM #6
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NGK seems to have good feedback from members of this board. I am definitely going for longetivity. Would be nice to not have to worry about them for another 100k. I will probably get some anti-seize to use. I think I'll just go with the lasers. It only adds up to an extra $3 anyway.

Also, whether it says Denso in the manual or not, doesn't Toyota put half Denso half NGK on from the factory anyway?
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Old 02-08-2013, 09:14 PM #7
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Quote:
Originally Posted by MikeInNH View Post
If there was even a chance for a .1% increase in performance then every professional race car on the planet would be using them. And they don't. They use standard copper plugs. They replace them before each race. They're NOT looking for longevity...just performance. And the standard copper plugs give them all the performance that's possible. So it's not worth it for them to use Platinum or Iridium plugs.

Some vehicles - you can only get Iridium plugs for (wifes Lexus ES-350). That's a good thing. Those rear plugs are a royal pain to replace.
Indeed. My 700+ rwhp 03 cobra used strictly copper NGKs.
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Old 02-08-2013, 09:23 PM #8
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Quote:
Originally Posted by MikeInNH View Post
CHEAPER??? You must have a discount dealer near you. The Denso plugs from the dealer are 4-5 times the price I can buy the EXACT SAME DENSO plug from my local parts store. The 3 Toyota dealers near me sell them for $21-EACH.
$21 each, I do find that hard to believe. I spent $26 and some change for 6 oem plugs. I buy my oil filters from the dealer for $4.99 + tax. I guess the dealers here in NM really know how to keep customers comin back.
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Old 02-10-2013, 02:42 PM #9
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You can believe what you want. I know what the prices are. I've NEVER ever seen a dealer selling parts even close to the local parts store. $4.99 for Iridium plugs from the dealer...you're DREAMING...You can't even buy them at discount houses for that price.
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Old 02-10-2013, 05:25 PM #10
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I went to Advanced Auto yesterday. Got 8 laser indiums, a can of seafoam, and a pack of anti seize for $81. I think I got a decent deal considering places wanted $13 to ship them.
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Old 02-10-2013, 05:34 PM #11
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Quote:
Originally Posted by MikeInNH View Post
CHEAPER??? You must have a discount dealer near you. The Denso plugs from the dealer are 4-5 times the price I can buy the EXACT SAME DENSO plug from my local parts store. The 3 Toyota dealers near me sell them for $21-EACH.
They are cheaper on ebay!
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Old 02-10-2013, 05:42 PM #12
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Quote:
They are cheaper on ebay!
EBay has good prices too. I have a good local parts store near me. While their prices may not be as low as ebay..they are good. And if I have any problem with anything I buy they take care of it with no questions asked. I just can't see paying dealer prices for the EXACT SAME PART. If the OEM part was better...then sure it might be worth paying the extra price...but these are the EXACT SAME PART...The ONLY difference between the Denso or NGK plugs you can buy from the dealer compared to the local parts store..is the Toyota dealers plugs have the name Toyota stamped on the plug.
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Old 02-10-2013, 05:47 PM #13
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Quote:
Originally Posted by MikeInNH View Post
EBay has good prices too. I have a good local parts store near me. While their prices may not be as low as ebay..they are good. And if I have any problem with anything I buy they take care of it with no questions asked. I just can't see paying dealer prices for the EXACT SAME PART. If the OEM part was better...then sure it might be worth paying the extra price...but these are the EXACT SAME PART...The ONLY difference between the Denso or NGK plugs you can buy from the dealer compared to the local parts store..is the Toyota dealers plugs have the name Toyota stamped on the plug.
That's actually news to me. I didn't even know Toyota put their name on the plugs at all. That explains the high price for sure. Some people are fooled into thinking those Denso plugs are Genuine Toyota parts.
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Old 02-12-2013, 10:36 PM #14
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Old 02-13-2013, 01:46 AM #15
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I just replaced the plugs on my V8 a few days ago (for first time for me with 136k miles) and purchased the Denso plugs from Ebay as well for a great price plus free shipping. I thought I had to remove the airbox. Just the proper height extension and a swivel helps as well. I have never used antiseize on the plugs. Antisieze compound have some sort of powdery/metallic substance I don't think that is any good on an aluminum head. As long as you torque it properly, not overtorqueing it you won't have a problem removing it the next time around.
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