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Thread: Which is the best spark plug for 2.0?

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    Default Which is the best spark plug for 2.0?

    Anyone change their spark plug yet? If so any suggestions?

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    Default Re: Which is the best spark plug for 2.0?

    i changed mine to the bosch +4 platinum.. yea i know its overkill, and i won't be able to get the full potential of it~~~ nothing but the best for my car =D
    it runs pretty well, works well on cold starts and it "feels" like theres more low end power. It also seems pretty good when i floor'd it on second gear, i should try timing it to see if theres any difference~
    Audi A3 2.0T - Koni Coilover's

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    Sr Member FLIPDADY's Avatar
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    Default Re: Which is the best spark plug for 2.0?

    Quote Originally Posted by chu View Post
    Anyone change their spark plug yet? If so any suggestions?
    Factory NGK Iridium ones are the best plugs to get.

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    Default Re: Which is the best spark plug for 2.0?

    Quote Originally Posted by FLIPPY View Post
    Factory NGK Iridium ones are the best plugs to get.
    Hey Joe wts the price for the factory spark plugs? PM me, thanks.

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    Default Re: Which is the best spark plug for 2.0?

    Quote Originally Posted by chu View Post
    Anyone change their spark plug yet? If so any suggestions?
    depending on the build date of your car, it either came with the NGK ITR5F-13 Iridium spark plug or the NGK ITR6F-13

    if it came with the ITR5F-13, you can replace it with the NGK TR55IX found at CanTire for $19.99/pair. The gap on the TR55IX is off by 0.007 thou of an inch; however, if you have a spark plug gapper, you can VERY GENTLY bring the gap down to 0.052" (you do not want to scrape the iridium tip with the gap tool). on the other hand, you don't have to bring the gap down to 0.052" if you plan on checking your plugs in the next 30-50k kms.

    You can also get the NGK TR5IX which has a 0.039" gap (which is smaller than the range listed in the 2004 service manual: 1.25-1.35 mm {0.049-0.053 in})...you may have to increase the gap on this one to fall within OEM specs, or wait until you're boosted to utilize the smaller gap.

    if it came with the NGK ITR6F-13, you can get the NGK TR6IX plug which also has a gap of 0.039".

    the NGK TR55IX, TR5IX, TR6IX are $19.99/pair at CT...so look to spend $40 for plugs.

    stock iridium plugs are something like $27 PER PLUG (last I checked in june 2004) because they also have a platinum tipped ground electrode (for longetivity sake...the Iridium IX plugs don't have a platinum tipped ground electrode).

    if you feel like changing your plugs more often and want to take advantage of the benefits of a copper plug (copper being a better conductor for one, and there are others), you can also get the NGK TR55, or NGK TR5, or NGK TR6 copper plugs from CanTire for $6.99/pair.

    iridium and platinum plugs are "hype". the major benefit of both are the longer change intervals. platinum plugs require more energy to spark vs. copper; iridium not so much vs. platinum but still not as good as copper. the disadvantage with copper is that it will need to be changed more frequently (lets say every 40,000km vs. every 120,000km for iridiums)...but, for the price of copper, the performance vs. cost benefit is better than iridium.

    i've got the NGK TR55IX in mine gapped down to as close to 0.052" as possible and will go to TR55 copper plugs in the spring/summer (picked up 4 for $5.59/pair at CT on sale)....as for why the TR55(IX), well, mine came with ITR5F-13 from the factory.

    hope that helps.
    Last edited by MajesticBlueNTO; 03-03-2007 at 05:51 PM. Reason: Spark plug gap range added

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    Default Re: Which is the best spark plug for 2.0?

    really nice write up thank you

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    Jr Member CanSpeed 3's Avatar
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    Default Re: Which is the best spark plug for 2.0?

    Whats the plug code for the Factory NGK Iridium plugs. I think ill go grab sum. And what do u torque them 2? Or do you just snug them? Id think not

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    Default Re: Which is the best spark plug for 2.0?

    Any suggestions on the 2.3L?

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    Default Re: Which is the best spark plug for 2.0?

    thanks gunna defs go with the copper next time i change!

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    Default Re: Which is the best spark plug for 2.0?

    Quote Originally Posted by mazda3GX View Post
    thanks gunna defs go with the copper next time i change!
    My opinion is stick with the stock plugs. From what I read, the copper plugs do work better, copper being a better conductor. However, you might have to change them sooner than the iridium ones. The iridiums last for a while so that's also a contributing factor... I changed the plugs on my old sedan.. It had 110K then I believe, with factory spec iridium plugs. Fuel mileage became better and a noticeable difference in performance like responsiveness and idle.

    Also, I'm not sure, but I think MBNTO has a speed when he posted this so it might not be best for the regular 3.. Just search a bit more and you'll find the answers.

    By the way, this is an old thread.

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    Default Re: Which is the best spark plug for 2.0?

    I had a regular 3 when I posted that info. I have a speed3 now and would only use iridium plugs in the speed3.

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    Default Re: Which is the best spark plug for 2.0?

    I would stay with the OEM Mazda sparkplug which is the NGK iridium

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    Default Re: Which is the best spark plug for 2.0?

    I emailed NGK Canada and asked if i should run NGK racing plugs with my set up on the 2.0L and the came back and said to use https://www.ngk.com/product.aspx?zpid=58516
    Use this website to find your plug .
    Found a set on a candian site with free shipping https://www.clubplug.ca/en/google/fi...SABEgKvd_D_BwE
    Use " NGKREBATE " for 5% off listed price.

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    Diflexster12 (10-15-2021)

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    Default Re: Which is the best spark plug for 2.0?

    Mini ... you are the undisputed king of necro lol

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    Default Re: Which is the best spark plug for 2.0?

    Quote Originally Posted by Destarah View Post
    Mini ... you are the undisputed king of necro lol
    Hahaa Thanks!!! i think... but this is important shit to get the best bang (pardon the sparkplug pun ) for buck and plug and keep your 3's running smooth to the Redline and beyond ..haha ! Getting ready for summer.

    I am actually looking at trying something new from NGK ... higher sparking plugs ...iridium to a new level or rather new metal compound. NGK Ruthenium HX with DFE (double fine electrode) maximizes ignitability for higher heat engines (engines with mods or drivers who like to track cars alot or for those enthusiasts who just like to rev it up and enjoy the sounds of their engines/exhaust) and PSPEŽ (projected square platinum electrode) for those supecharged 2.0L mx5 or turbo engines. They are about the same price (pennies difference) as iridium laser. I pick ed up some on clubplug.ca for $16 each tax in and free shipping. Im also planning to upgrade the ignition coils. 2020 Goal is to be 1/2 sec to a sec faster and drop some weight .

    http://www.ngksparkplugs.ca/products...enium%20HX.cfm

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    Default Re: Which is the best spark plug for 2.0?

    Where do you folks buy your plugs, online dealer, or elsewhere?
    '
    Made in BC.

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    Default Re: Which is the best spark plug for 2.0?

    Clubplug.ca

    Sent from my SM-G986W using Tapatalk
    2010 Black Mazdaspeed 3 - Lightly modded

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    Default Re: Which is the best spark plug for 2.0?

    Quote Originally Posted by S.F.W. View Post
    Clubplug.ca

    Sent from my SM-G986W using Tapatalk
    Yeah same here
    Got my NGK Ruthenium HX plugs there ... least expensive i could find at the time
    I also recently got my NGK MAF & A/F O2 senser a weeks ago.

    They sometimes have discount coupon when you sign up for their newsletter

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