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#1
1st January 2012, 07:25 PM
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Iridium plugs
Are the denso vk20 iridium tough plugs the best plugs you can buy ? I want to change my plugs ( all 12 of them) and as i know its not going to be an easy job then i would like to get the best i can. Does anybody know any better plugs or longer lasting plugs ?
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Audi S8 Phantom Black 
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#2
1st January 2012, 08:01 PM
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Darren, i would buy OEM plugs from dealer.
I'm sure Audi uses best and longest lasting plugs for your engine. Don't risk. AFAIK you will have to remove engine head to do that. Perhaps you'll need a gasket from dealer anyway.
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I'd rather drive on left
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#3
2nd January 2012, 05:56 AM
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Manufacturers does not always use best stuff. They use what is good enough and not too expensive as they need to think about end product price to be competitive. Many manufacturers do use Iridium plugs as standard.
Iridium is the best and longest lasting as far as I know. LPG variation is supposed to be even tougher but not sure how suitable for petrol cars. As for the make I normally go for NGK or Denso.
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Currently 8less 2011 Q7 S Line 3.0TDI, 2016 Tesla Model S 90D 8 history: 2006 A8 Sport 4.2TDI quattro SOLD, 1997 S8, reached end of life with gearbox failure
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#5
2nd January 2012, 07:07 PM
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Before I switched to gasoil, I always used NGK as the threads seem to be of a very high quality compared with other makes. This was pointed out to me by a mechanic who said pinch the threads and rotate the plug of an NGK and a Champion. The champion almost cut my fingers and felt sharp and rough like it had been cut with a die compared to the perfectly smooth and comfortable NGK.
This is due the way the threads are made... http://www.mmsonline.com/articles/ro...has-advantages
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