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#4497451 - 08/25/17 03:42 AM Recommend a spark plug for Toyota 2.4L
Vladiator Offline


Registered: 01/04/16
Posts: 728
Loc: NC
Need recommendations for good spark plugs for a 2.4L (2AZ-FE) Toyota engine in 2009 Scion xB. Which ones seemed to improve the performance the most for you? Thank you in advance. Would like to stay under $60 for 4 spark plugs.
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#4497452 - 08/25/17 04:18 AM Re: Recommend a spark plug for Toyota 2.4L [Re: Vladiator]
Char Baby Offline


Registered: 05/25/05
Posts: 10028
Loc: ROCHESTER, NY
Generally you should replace with the same factory which are most likely Denso or NGK. These will/should give you the best performance, fuel economy & longevity. And you could easily spend less money than $60...maybe even 1/2 that if you buy online.
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#4497455 - 08/25/17 04:40 AM Re: Recommend a spark plug for Toyota 2.4L [Re: Vladiator]
chrisri Offline


Registered: 06/01/14
Posts: 1744
Loc: Rijeka, EU
Denso makes good spark plugs. NGK seems to be copied or they relaxed QC because there was a bad series here. Beru is another option (made in EU) but I'm unsure if available in your specification.
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#4497456 - 08/25/17 04:45 AM Re: Recommend a spark plug for Toyota 2.4L [Re: Vladiator]
Crispysea Offline


Registered: 04/14/17
Posts: 403
Loc: TN USA
Denso or NGK. Stay away from Bosch.

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#4497459 - 08/25/17 05:00 AM Re: Recommend a spark plug for Toyota 2.4L [Re: Vladiator]
Rolla07 Offline


Registered: 11/05/11
Posts: 4740
Loc: MTL, CANADA
OEM.
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#4497474 - 08/25/17 05:47 AM Re: Recommend a spark plug for Toyota 2.4L [Re: Vladiator]
incognito_2u Offline


Registered: 12/15/16
Posts: 113
Loc: Long Island, N.Y.
What he said ^^^

Open up the owners manual and pick either the NGK or the DENSO spec'd out in the manual.
Both great plugs.......
$60 seems high for 4 plugs, though.....shop around.
Good Luck!


Edited by incognito_2u (08/25/17 05:49 AM)
Edit Reason: spelling
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#4497476 - 08/25/17 05:51 AM Re: Recommend a spark plug for Toyota 2.4L [Re: Vladiator]
dblshock Offline


Registered: 04/24/07
Posts: 2655
Loc: WI.
Denso, the thin wire oem version.
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#4497485 - 08/25/17 06:20 AM Re: Recommend a spark plug for Toyota 2.4L [Re: Crispysea]
Mr Nice Offline


Registered: 09/12/04
Posts: 21209
Loc: Orlando, FL
Originally Posted By: Crispysea
Denso or NGK. Stay away from Bosch.


Yep.

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#4497486 - 08/25/17 06:21 AM Re: Recommend a spark plug for Toyota 2.4L [Re: Vladiator]
khittner Offline


Registered: 07/13/12
Posts: 316
Loc: Michigan
I have NGK iridiums arriving today from RockAuto for my Camry's 2AZ-FE. $26 to my door.

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#4497492 - 08/25/17 06:28 AM Re: Recommend a spark plug for Toyota 2.4L [Re: Vladiator]
Leo99 Offline


Registered: 03/30/14
Posts: 3052
Loc: NJ
I use denso. Buy them from Amazon.
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#4497500 - 08/25/17 06:51 AM Re: Recommend a spark plug for Toyota 2.4L [Re: Vladiator]
barkingspider Online   content


Registered: 12/22/13
Posts: 2051
Loc: socal
Hard to beat denso, ngk, oem
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#4497510 - 08/25/17 07:21 AM Re: Recommend a spark plug for Toyota 2.4L [Re: Vladiator]
Vladiator Offline


Registered: 01/04/16
Posts: 728
Loc: NC
Thank you fellas. Will go with NGK. Which is more beneficial though... Copper NGK and replace every year? Which I dont mind, it'll take 10 mins. Or iridium plugs? Do they simply offer longer interval? I want to get the best performance, do not care for the interval. Best performace in terms of fuel economy and power. So which type of NGK?
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Thicker oils give protection for severe operations such as driving in mountains, pulling a boat, dusty conditions, short trips, high rpm, overloading, overheating and overcooling. Thin oils give MPG.

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#4497527 - 08/25/17 07:45 AM Re: Recommend a spark plug for Toyota 2.4L [Re: Vladiator]
bioburner Offline


Registered: 09/19/16
Posts: 1418
Loc: Minnesota
A pack of iridium Denso or NGK via Amazon are around 25 bucks. Most vehicles using iridium have a change interval of around 90 to 100k. I may pull and check my plugs next spring for the summer driving season. Right now with my Xb having only 35k and it starting near instantly and use of 5-20 its getting over 30mpg. If the car had a 5 speed tranny it would easily get upper 30's IMO
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#4497537 - 08/25/17 07:53 AM Re: Recommend a spark plug for Toyota 2.4L [Re: Vladiator]
khittner Offline


Registered: 07/13/12
Posts: 316
Loc: Michigan
I doubt that you'd be able to note much difference in your performance measures traceable to your spark plug choice, regardless of marketing hype. Iridiums last the longest distance/time, but I won't run them to 100K as Toyota suggests. The iridium plugs' thread plating may prevent their seizure in the cylinder head, but I still replace them at 50-75K miles to be sure that I have no problems getting them out. This has worked well enough for my Camry's first 263K miles.


Edited by khittner (08/25/17 07:55 AM)

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#4497547 - 08/25/17 08:05 AM Re: Recommend a spark plug for Toyota 2.4L [Re: Vladiator]
UG_Passat Offline


Registered: 05/27/08
Posts: 1970
Loc: NJ
Originally Posted By: Vlad_the_Russian
Thank you fellas. Will go with NGK. Which is more beneficial though... Copper NGK and replace every year? Which I dont mind, it'll take 10 mins. Or iridium plugs? Do they simply offer longer interval? I want to get the best performance, do not care for the interval. Best performace in terms of fuel economy and power. So which type of NGK?


Wire diameter choice impacts performance vs longevity. Thinner means better performance but reduced longevity

Also ground electrode impacts performance vs longevity. Tapered electrode is better performance but reduced longevity. The rectangular with platinum disc is less performance but better longevity.

I have a set of NGK BR7REIX (0.6mm wire diameter with tapered ground electrode) coming via Amazon to replace the stock plugs on mine, which are equivalent to NGK PFR7S8EG (which is an expensive plug), which is a double platinum plug.

Denso also has "Twin tips" (suffix of TT), which has a cylinder (I think platinum alloy) welded to the ground electrode to give it a balance of performance (reduced quenching of the flame kernel) and longevity (platinum alloy wear resistance). IK-TT's have 0.4mm wire diameter.


If you went Denso, it would be the IK16, IK16-TT, or SK16R11 (0.7mm wire with standard electrode with platinum disc)


Edited by UG_Passat (08/25/17 08:14 AM)
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