just wondering how much for spark plugs and how difficult are they to change at home??? Also are people using anything other than Genuine plugs??? Is there a better aftermarket plug???

I brought these from the states http://www.ssgm.com/issues/image.aspx?src=/daily_images/27234-22410.jpg&size=170


I got mine fitted when the timing got done at 100K

Can you tell me exactly how to get them from the States please, i cant find and part numbers etc and how much did they cost??? Thanks for your help.
I brought these from the states http://www.ssgm.com/issues/image.aspx?src=/daily_images/27234-22410.jpg&size=170


I got mine fitted when the timing got done at 100K

How much where these spark plugs? Where did you get em from? Ebay>?

Yeah I saw those on Ebay, can be got for considerably cheaper than locally even with postage.

From what I have heard though, the Denso 'Iridium Power' are even better. They don't look as fancy, but fancy doesn't equate to performance. They have the finest centre electrode (finer is better), and have a claimed life of 150,000km. If you change them at 100,000km, they will still be good, meaning you haven't lost any performance from them. Plugs that claim 100,000km means they will be worn at 100,000km, meaning potentially reduced performance.

Going by the list here:
http://www.globaldenso.com/cgi-bin/global/plug/au/4w/plug.cgi?action=search&filename=4w-53.txt

You want the IK16 plugs for the 380, and they also serve for 6G74. 6G72 uses IK20(http://www.globaldenso.com/cgi-bin/global/plug/au/4w/plug.cgi?action=search&filename=4w-53.txt&name=&cc=&FF=50).

Here is the cheapest Ebay listing for the Denso IK16's:
http://www.ebay.com.au/itm/1-x-DENSO-IRIDIUM-POWER-IK16-Spark-Plug-Performance-Racing-Tuned-Turbo-JAPAN-USA-/160748522832?pt=Motors_Car_Truck_Parts_Accessories&hash=item256d5bcd50

Remember that price is per plug, so buy 6 of them (each additional plug is cheaper for postage).

I've been talking to a guy in the USA about plugs and he is saying to get NGK Iridiums. they are about 60 including postage for all 6 and in Australia they are about 120. He tells me he prefers NGK as apparently they are standard on Mitsubishi in USA. Food for thought guys, i'm gonna wait for more advice but i doubt u can go wrong with Bosch Platinum/Iridium or the NGK Iridiums, he did say the Bosch Platinums would last longer. Either way guys look on ebay they are cheap as from the States!!!
How much where these spark plugs? Where did you get em from? Ebay>?

Can anyone tell us how hard it is to change these Bad Boys???

In my previous post, I meant to write 'Denso Iridium Power', not 'Denso Iridium's' (I've corrected it). Also the 6G72 uses IK20's, I wrote the use IK16 by mistake.
6G72 - IK20
6G74 - IK16
6G75 - IK16

The NGK's are also good, but just because they are on the car by default it doesn't mean they're the best. I was looking at the Iridium IX's myself, but they have a 0.8mm centre electrode compared to the Denso Iridum Power's 0.4mm centre electrode. It uses a different tech to attach it, and the Denso uses an Irdium alloyed with a tiny bit of Rhodium (very similar properties to Iridium) to fix the oxidation problem of Iridium over the life of the product.

You really can't go wrong with the:
- Bosh Platinum IR Fursion
- NGK Irdium IX's
- Denso Iridum Power

but from what I can see the Denso has the upper hand at the moment. They are probably more expensive normally, but luckily on Ebay they are all around the same price.

In my previous post, I meant to write 'Denso Iridium Power', not 'Denso Iridium's' (I've corrected it). Also the 6G72 uses IK20's, I wrote the use IK16 by mistake.
6G72 - IK20
6G74 - IK16
6G75 - IK16

The NGK's are also good, but just because they are on the car by default it doesn't mean they're the best. I was looking at the Iridium IX's myself, but they have a 0.8mm centre electrode compared to the Denso Iridum Power's 0.4mm centre electrode. It uses a different tech to attach it, and the Denso uses an Irdium alloyed with a tiny bit of Rhodium (very similar properties to Iridium) to fix the oxidation problem of Iridium over the life of the product.

You really can't go wrong with the:
- Bosh Platinum IR Fursion
- NGK Irdium IX's
- Denso Iridum Power

but from what I can see the Denso has the upper hand at the moment. They are probably more expensive normally, but luckily on Ebay they are all around the same price.

NGK iridium IX have a 0.6mm centre electrode, not 0.8mm.

but while Denso power iridium have a smaller 0.4mm centre electrode, it's plugs life also shorten to 40k km or less.

Bosch Ir Fusion are going obsolete, replace by Bosch OE Ir with 0.6mm tip with platinum ground, designed to go 100k km. if you after power only, go for Denso power iridium, medium NGK IX or long life Bosch OE Iridium.

Can anyone tell us how hard it is to change these Bad Boys???

Same as the 3rd gen engine, takes time to remove intake etc to get to the rear plugs. If you go slow, take note of where every bolt, hose and electrical connection came from, and use a torque wrench to do things up to the manual specifications you can't go wrong.

A lot of info here that isn't really helpful. Spark plugs don't make power, they spark or they don't. The standard plugs on the front bank are good for much more than the scheduled time interval, going iridium is overkill IMHO. NGK platinum plugs can be had for about $3 each if you shop around (outside Aus) and for that price you can afford to drop a full set in and be right for at least 100,000 km.

NGK iridium IX have a 0.6mm centre electrode, not 0.8mm.

but while Denso power iridium have a smaller 0.4mm centre electrode, it's plugs life also shorten to 40k km or less.

Bosch Ir Fusion are going obsolete, replace by Bosch OE Ir with 0.6mm tip with platinum ground, designed to go 100k km. if you after power only, go for Denso power iridium, medium NGK IX or long life Bosch OE Iridium.

I was going by the Denso Australia website that claims the Iridium Power's lifespan is 150,000km:

Designed for durability under the most extreme conditions, DENSO's patented iridium alloy is 6 x harder and 8 x stronger than conventional platinum and can handle temperatures in excess of 2,450°C. With an approximate life span of 150,000km, these properties make Iridium Power® long life plugs the most durable and robust in the market. http://www.denso.com.au/Products/Automotive/Spark-Plugs

False advertising? Big difference between 30,000km and 150,000km!

Same as the 3rd gen engine, takes time to remove intake etc to get to the rear plugs. If you go slow, take note of where every bolt, hose and electrical connection came from, and use a torque wrench to do things up to the manual specifications you can't go wrong.

A lot of info here that isn't really helpful. Spark plugs don't make power, they spark or they don't. The standard plugs on the front bank are good for much more than the scheduled time interval, going iridium is overkill IMHO. NGK platinum plugs can be had for about $3 each if you shop around (outside Aus) and for that price you can afford to drop a full set in and be right for at least 100,000 km.

I reckon Max is on the money here. I've used NGK platinums for my last two sets of plugs, specifically the BKR6EGP G-Power (7092), and I can't fault them. Each time I got them from a US based eBay seller at a fraction of the cost of the local Oz price. I swapped out my last set a few weeks ago at 60,000k and the old ones still looked and performed as good as new.

For a stock 380 you want the BKR5EGP (7090), and the cheapest I could find just now is these:

NGK (7090) BKR5EGP G-Power Platinum Spark Plug, Pack of 1

Edit - link no work, but it was $1.90 US each. As Max says, check out eBay and you'll find them plenty cheap.

This is where I got my last set from:

NGK BKR5EGP G-Power Platinum Spark Plugs, Set of 6 - Ni... (http://cgi.ebay.com/ebaymotors/NGK-BKR5EGP-G-Power-Platinum-Spark-Plugs-Set-6-Nissan-Subaru-Toyota-More-/320946343071?pt=Motors_Car_Truck_Parts_Accessories&hash=item4ab9e48c9f)

I was going by the Denso Australia website that claims the Iridium Power's lifespan is 150,000km:
http://www.denso.com.au/Products/Automotive/Spark-Plugs

False advertising? Big difference between 30,000km and 150,000km!

From what i understand, Denso iridium tough are long life plugs with 100k km design life, while Denso iridium power are not.
see FAQ here: http://www.densoiridium.com/faq.php

Ah ok! That is a bit of dodgy information on the site then, they should actually state 'Denso Iridium Power Tough', not just say they that under the 'Iridium Power' description!

Denso are selling Iridium Tough and Iridium Power in SE Asia and in Singapore, both look similar but Tough are much more costly. If you can get it cheap then go for the Iridium Tough instead, if not NGK IX would be a good compromise.

I just ordered a set of Bosch Platinum Fusions from America for $56 including postage.

Ah ok! That is a bit of dodgy information on the site then, they should actually state 'Denso Iridium Power Tough', not just say they that under the 'Iridium Power' description!

Looked it up, its around 30,000 miles or so for the Denso Iridium Power (almost 50,000km). This is NOT a required changepoint, its just it will be more of a 'normal performance' plug after this mileage. The reduction in performance isn't due to the iridium tip, but the earthing electrode. The Iridium Power Tough's last much longer (120,000km) because there is an additional iridium tip on the earthing electrode, which saves the electrode being worn.

So optimally you would replace the Iridium Power's at 50,000km, so every second change is when the timing belt is done. Alternatively you could put the tough's in the back, and the standard Iridium Power's in the front if that is more cost effective.

Cosnider this, 6 spark plug changes over 300,000km isn't too bad considering they can be bought quite cheaply. Gives you the chance to clean the MAF sensor, throttle body, check the spark plug tubes for oil etc.

I've got a set of brand new NGK Iridiums that I was going to putt in my newly purchased 380 when my honest mechanic said the the ones in the car I bought were fine, you can have them for $75 plus frieght

Can get them much cheaper from the States including postage.
I've got a set of brand new NGK Iridiums that I was going to putt in my newly purchased 380 when my honest mechanic said the the ones in the car I bought were fine, you can have them for $75 plus frieght

Minor thread mine.

I'm thinking about changing my current NGK G-Power platinum plugs, model BKR6EGP (stock # 7092) for NGK Iridium IX.

I have a brand new set of 6 of each of the Iridium IX BKR5EIX (stock # 6341) and the Iridium IX BKR6IEX (stock # 6418). I meant to order 6's but stuffed up and ordered 5's, so now I have a set of each.

Should I go with the 5s or the 6s?

Stock plugs for a 380 are heat range 5, but mine is lightly tuned (ChipTorque Xede piggyback ECU tuned for 98RON with leaned out AFRs and mildly advanced timing + RPW extractors + free flow exhaust system + improved intake), so I've been using heat range 6 plugs for the last 90,000k odd, with no problems so far.

So I'm leaning towards putting the BKR6IEX's in rather than the BKR5IEX's, and selling whichever set I don't use. The 5's (being the stock heat range) will probably be easier to sell than the 6's.

What do you tuning gurus reckon?

No responses, so I went ahead this morning and put in the BKR6IEX's.

New For Sale thread coming soon, four sets of spark plugs for sale, 3 used but in good nick and 1 new.

I'm very interested in the new ones.
Can we arrange to meet up to do the deal?

Why do they not come with all Platinum plugs is it just the price factor? I cant see any other reason?

Why do they not come with all Platinum plugs is it just the price factor? I cant see any other reason?

Copper plugs give a better spark, but don't last as long. I can change all 3 front bank spark plugs in about 10 minutes and it costs me $13. No need to go platinum in the front bank IMO.

380 use all iridium plugs, both front and rear bank, remember that the 380 also uses COP set up not a dist and cap and leads etc

I'm very interested in the new ones.
Can we arrange to meet up to do the deal?

Rob,

I didn't see this post of yours and you didn't post anything in my For Sale thread here: TreeAdeyMan's giant spark plug sale! (http://www.aussiemagna.com/forums/showthread.php?t=99865)

Have a look in that thread and you'll see that taniagirl was interested and willing to pay the asking price.

I PM'ed taniagirl a week ago about her offer but she hasn't responded.

I'll now add another post asking her to respond, and if she doesn't respond fairly quickly to that post then to be fair I should offer them to dreggzy who also expressed interest.

If neither taniagirl or dreggzy still want them (at the price I am asking) then you're in the running.

But you really should post up in the For Sale thread to be fair on others!

KJ.

Kim,

Sorry about the bad etiquette, I'm still interested and will post my interest in the for sale thread.

NGK platinum plugs can be had for about $3 each if you shop around (outside Aus) and for that price you can afford to drop a full set in and be right for at least 100,000 km.

I'd like to get me some of them! No sign of the $3 plugs on Ebay though?

Steve

http://www.rockauto.com/catalog/x,carcode,1374397,parttype,7212

NGK BKR5EGP $2.36 each.