Denso Spark Plug or NGK 4th gen

[ts9790147]

So it has come time to change the spark plugs in my 2006 4Runner V6 Sport Edition and was wondering what the everyone else is running. I am looking at one of the following:
Denso Iridium Long-life Plug - SK20HR11
Denso Iridium Power Plug - IKH20
NGK - Iridium IX - LFR6AIX-11

What is the best one for for this 4Runner

Thanks

 

[scottm]

X2. I know guys are saying the basic plugs are good enough, but I'm not excited about replacing them every 30k. Mine are probably original at 52k, and it runs great, but I'd rather have something that's not gradually eroding toward it's limit, slowly changing the engine dynamics.

Thanks ts for getting this much info, where are you getting it?

 

[074.0Runner]

X2. I know guys are saying the basic plugs are good enough, but I'm not excited about replacing them every 30k. Mine are probably original at 52k, and it runs great, but I'd rather have something that's not gradually eroding toward it's limit, slowly changing the engine dynamics.

Thanks ts for getting this much info, where are you getting it?

I've replaced them every 30K on every vehicle I have ever had!

I got NGK V-Powers and got them at NAPA.

 

[Will_4R]

Is there any reason not to use the NGK or Denso plugs that Toyota recommends? Presumably the engineers at Toyota have figured out the best plugs for this particular truck. Considering how easy it is to change them, and the relatively low cost, is chaning them every 30K miles really a big deal? Is there something here I am missing?

 

[074.0Runner]

Is there any reason not to use the NGK or Denso plugs that Toyota recommends? Presumably the engineers at Toyota have figured out the best plugs for this particular truck. Considering how easy it is to change them, and the relatively low cost, is chaning them every 30K miles really a big deal? Is there something here I am missing?

This is a guide I use when buying plugs:
GM - AC Delco
Ford - Autolite
Mopar - Champion
Toyota - Denso
Honda - NGK
...Because thats what they put in at the factory...

 

[MikesToy]

I'm getting these on my next oil change.

Carson Toyota TRD Parts, Replacement parts and accessories for Southern California

 

[eskimochaos]

I'm getting these on my next oil change.

Carson Toyota TRD Parts, Replacement parts and accessories for Southern California

Why wouldnt you get Denso?

 

[CJ3Flyr]

I'm very pleased with these: Denso Iridium Long-life Plug - SK20HR11.

I chose them for a couple of reasons: 1) I don't want to change plugs every 30k. I know, with these, I could run 100k or so on this plug. Most vehicles that come with this series of Denso plug call for spark plugs between 100k-120k miles. I will change them after 60k-75k or so 'cause that's how I roll 2) Denso is one of the OE brands so I have greater confidence that the reach will be identical as will the heat range.


I'm not slamming the NGK by any means, to the contrary, I don't think you can go wrong.


As far as the "power plug" goes I don't think the T4R, in stock form, has enough compression or pumps enough fuel through it to realize any benefit. If I understand it correctly the "power plug" isn't considered a long life design too.


TRD plugs: It's up to you. I'm inclined to say it's waste for the above reasons combined with I consider a lot of that to be snakeoil. Notice they don't show the plug firing under pressure... IIRC the compression will affect spark propagation a good bit. When all is said and done it'll fire much like a regular plug. Link to supplier of TRD plugs: Welcome to Extreme Spark - The Wold's only spark plug capable of increasing your performance!



This link is worth a look too... http://www.toyota-4runner.org/maintenance/57729-why-bosch-plugs-suck.html
:cheers:

 

[MikesToy]

Why wouldnt you get Denso?

I wanna test these. They say it could go like almost forever.

 

[jstutz101]

For what its worth I just changed the original plugs in my '03 4Runner with 90,000 miles. The plugs were worn but the car ran fine. I think the biggest reason to change them sooner would be to make them easier to get out. They were in there pretty tight. I did see a small increase in mileage after the change. BTW, went with OEM Denso's from the stealer.

 

[Will_4R]

ok, this is a bit of a hijack, but do you guys use anti-seize compound on them?

 

[CJ3Flyr]

ok, this is a bit of a hijack, but do you guys use anti-seize compound on them?

I do, never had an issue doing this way.

 

[kimboy]

K20HRU11, Buy 12 or 18. Tomorrows prices are always higher.

Using anti seize is important. I felt as if I was boring out the head on my rear passenger plug. It came out rough and scared the bejezus out of me.

Make changing out the plugs routine and it should get easier each time.

 

[raydouble]

ok, this is a bit of a hijack, but do you guys use anti-seize compound on them?

Always :dancin:

I know we are all spoiled by driving Toyotas but spark plugs?

Every year and a half or two is too much work for some of you guys?

 

[kimboy]

Yep, 40K for a vehicle, and the truck should be able to change it's own oil, plugs, wiper inserts. People want everything to be automatic these days. Luckily cars aren't like vcr's that once broken, are thrown away.

Keeping a mechanical system well maintained is the key to longevity.

 

[MICA4R]

X2. I know guys are saying the basic plugs are good enough, but I'm not excited about replacing them every 30k. Mine are probably original at 52k, and it runs great, but I'd rather have something that's not gradually eroding toward it's limit, slowly changing the engine dynamics.

Thanks ts for getting this much info, where are you getting it?

Do you know if there is a benefit of "pregapped iridium" vs. "platinum"

At advance auto parts they have both which are made by denso. the price is $9(irid) vs. $3(plat)

 

[OrdnanceMarine]

As I understand it, the main benefit of iridium is you can create a finer center electrode tip and therefore create a smaller "shadow" for the pressure wave that comes from the expansion of gasses as they burn as well as get finer control of where the ground arc will jump the gap and create a more consistent flame kernel.

Platinum is great for longevity but not very good for much else when it comes to electrode tips. I believe that copper plugs actually would perform better than platinum but car makers are driven to get the 90k, 100k, etc. "no tune up" feature for marketing and the performance loss is not noticeable to all but someone who has very controlled conditions and knows exactly what to look for.

If I recall correctly, the long life iridium plugs that are currently available use an iridium center electrode tip and a platinum pad on the ground electrode.

 

[SUBTEGRAL]

NGK all the way.

 

[T4RUSAF]

I'm rocking the iridium denso's for about 40k miles. No problem here but I wouldn't expect any.

 

[Rix]

Really...... Whatever.
Ngk or Denso.
"regular" platinum, iridium, whatever u feel like.
I Say no to anti sieze.
Chevy, Ford, whatever. They ALL get Ngk or Denso to me.