Which spark plugs ?

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hirsty
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Which spark plugs ?

Post by hirsty »

The one item not yet replaced on my car is the spark plugs. Looking around there are many variations available including some quite expensive Iridium tippped ones. Has anyone any thoughts/recommendations on type ?
98 Xantia Mk2 2.0 16v Auto Exclusive 160k + Now gone to Citroen Heaven
2004 C5 Mk 1 2.0 8V VTR Estate - current. Now with leather.
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VertVega
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Post by VertVega »

I would recommend Eyquem spark plugs. According to my Xantia's specs I use type RFN 58 LZ.

You can visit web site http://www.eyquem.com/ and try eCatalog "Find the right product for your car".
Last edited by VertVega on 26 Dec 2008, 10:34, edited 1 time in total.
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Post by addo »

I reckon you need to mount a good case for anything other than OEM-spec plugs. After all, change interval is something like 50K miles.

Honestly, I'd save the money some might spend on fancy plugs with effluvium tips or whatever, and put it towards some spare coil packs.

Regards, Adam.
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Post by Ross_K »

I'd go with the bog standard Bosch or Champion plugs as well.

I've no doubt iridium plugs would be great though. If you drove a Ferrari or something... :lol: :lol:
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Post by citronut »

NGK are very good plugs, i certaily would not touch champion

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AndersDK
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Post by AndersDK »

Later type plugs are mostly F3 types, which have 3 ground electrodes for better longevity.
Also the fancy stuff irridium etc. is the center electrode composite which have far better longevity than standard plugs.

Thats how they make 50K (miles) service life out of recent plugs.
Standard plugs wont last more than 20K tops, and would have to be re-gapped a couple of times to ensure trouble free starting and running.
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Post by addo »

Standard plugs wont last more than 20K tops, and would have to be re-gapped a couple of times to ensure trouble free starting and running.
The factory derived service recommendations I have here for late XU10J4R, set an interval of 60 000km for replacing plugs. There is no inspection or adjustment scheduled before this, nor is it dependent on type of driving (urban or country). Wouldn't it be reasonable to suggest they've put a margin of "safety" on their product life, even at that mileage?

When I get to 20K since replacement (in about two months) I'll pull one and have a look/photgraph it. From memory we used NGK to the original spec.

Regards, Adam.
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