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hi new member and very first 1997 xk8


charlie boy
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hi everyone , I'm a newbie to all this and a first time owner of a xk8, and I'm loving it. I want to treat the car to a new set of spark plugs and wonder which is the best type to buy not knowing if theres any upgraded new type of plug to use or not . any help would very appreciated. thanks.post-8635-0-37448900-1449866447_thumb.jp

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Hi Charlie and a warm welcome to THE Jaguar OWNERS CLUB. You will find a great set of guys on here always willing to assist.

spark plugs are a matter of individual choice just like that of Oil however, there are differing types of spark plugs with offer different attributes such as copper and platinum. Platinum will last longer than copper however copper conduct better than platinum, please see below;

Copper spark plugs vs. Iridium and Platinum: Understand for Top Performance

Many people come to the point where they are forced to change the spark plugs on their vehicle and face a difficult decision; copper spark plugs or those of another type? You can find spark plugs in a variety of different metal combinations, including aluminum spark plugs, iridium plugs, platinum and more. Copper core spark plugs are still the most commonly seen, however, and many people agree that they are the best. However, the advertising that accompanies the different types of spark plugs is potentially misleading, so it's important to recognize the real difference between the spark plugs in question. In order to do that, it's necessary to first learn about what the metal in the spark plug is used for.

Purpose of the Metal

The metal in a spark plug serves a single basic purpose: to channel the electric energy from the plug wire through the spark plug so that it can be forced to the engine block in the form of a spark. Therefore, any metal that conducts electricity at all could potentially be used for a spark plug. The metal should also not get too hot; one of the main problems with some metals is that they overheat quickly, causing the electric charge itself to be compromised and the spark plug to not operate as smoothly.

Copper Spark Plugs

Copper spark plugs are generally considered to have the best performance of any spark plug type. This is potentially different from what advertising companies suggest, but the other metals are, unfortunately, not as conductive in general as copper is. Platinum and iridium plugs are more likely to overheat, which causes damage to the plug components and can compromise the delivery of the spark to the engine block.

Platinum and Iridium Plugs

Platinum and Iridium plugs perform at a lower level than copper spark plugs, because they are less conductive and they tend to overheat. However, the overall longevity of these two types of metal is better than copper plugs. In reality, copper has the best performance of all three and the worst longevity. Platinum has good longevity and the worst performance. Iridium has good longevity and a performance that is decent, which is why iridium plugs tend to be more expensive than any other type. Still, the difference between these plugs in terms of overall quality is minimal, as there is a trade off for each.

Most copper plugs need to be changed every 20,000 miles or so. Platinum and iridium plugs can often go for twice that before they require changing, but the overall performance will not be as good and you may have to deal with overheating of the plugs. This is potentially not worth the added cost of both platinum and iridium spark plugs, although the decision will depend upon your preference.

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hi Kenny, thanks very much for your help in this matter its been very informative and has helped me decide which type of spark plug to go for. I don't intend to do a lot of mileage so I have decided on the copper type plug and give my Jaguar the best of what I can.

I bought the car from a private dealer in pool dorset and drove back to west Yorkshire without her missing a beat. once again thanks very much for your help in this matter and I hope to chat with you and members soon about the xk8's. I sure as time goes on there will be a few issues that arise where I could need advice from time to time

 

                                                                        kind regards Charlie ..

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