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Thread: iridium plugs for 1.8?

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    Regular Member jimmyred's Avatar
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    Default iridium plugs for 1.8?

    It's my birthday this week (36 since you ask) and I'm thinking of asking my Mrs to get my some iridium plugs for my z18xe.
    I changed my plugs recently and since the old ones were very old I was really impressed with difference. (just Bosch platinum ones)
    So what I want to know is has anyone upgraded to iridium plugs from relatively new plugs? I read a lot of reports saying what a difference they made but I'm guessing they were changing from old plugs, and so the difference might just be due to new plugs.
    Am I gonna notice a big difference since my plugs are in good condition already?

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    Vehicle : Vectra C Hatchback Facelift

    Trim : Club

    Engine : Z18XE

    Year : 2005

    Mileage : 100085

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    Our car is a 55 reg Facelift Club Spec C with the Z18XE engine...

    These are threads I posted my experience & posted this in thread...

    http://www.vectra-c.com/forum/showthread.php?t=115997

    The picture I posted below, in this thread, shows the plugs - removed - fitted from new - GM/ Bosch.....which look in pretty good shape to me....(Using Supermarket standard unleaded petrol - Mainly Morrison's & Sainbury's)

    http://www.vectra-c.com/forum/showpo...72&postcount=6

    & another post...

    http://www.vectra-c.com/forum/showthread.php?t=108007

    As explained..I used NGK equivalents for the GM/Bosch that were fitted from new...because we stocked NGK plugs at the a Motor Factors where I work part time...Had we stocked another make..I would have used their equivalents....

    Can't say I've noticed a significant difference.....

    Hope it helps....

    Cheers

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    Regular Member jimmyred's Avatar
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    yes, I noticed a big difference last time but my old plugs were knackered and black cos my engine had been overfueling a while due to temp sensor/thermostat problems, so that was why probably.
    This is why I suspect iridium plugs might not make much difference this time. Gonna get em anyway, its my birthday why not? I'll report back on how they compare to normal ones.

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    How did they compare in the end??. I know this is an old thread now, but I'm looking at whether it's worth geting the Iridium IX plugs?

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    Regular Member 6009tristanb's Avatar
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    iridium plugs could i recomend them hell yes i bought denso iridium ik20 for mine and their grrrrreat hook them up with a nice k&n panel filter and you will smile

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    is that due to mpg or performance? whats the interval on them? the vx ones are 8 years/80k??!? (wonders if my 2.2 needs them at 32k)

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    Quote Originally Posted by ijk571 View Post
    is that due to mpg or performance? whats the interval on them? the vx ones are 8 years/80k??!? (wonders if my 2.2 needs them at 32k)
    Someone posted up that their 2.2 was on the original plugs at 88k. I did ask them to post pictures and report back about fuel consumption after fitting new ones, I dont think they ever did. 80K plugs changes ffs
    "We are not some sort of dictatorship!"


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    I know, lol, 80k, that's ridiculously high. Always thought it was about the 30-40k mark. So no point putting fancy ones in after 30k odd really then is there?

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    TBH for the cost of normal spark plugs I see no issue in replacing them yearly.
    "We are not some sort of dictatorship!"


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    Just need to get part numbers now... and see if they were changed at the major service 5 weeks ago.

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