A few thoughts on this:

They are stick coils. We've used them on motorbikes for years, so the HT side of your spark sits on top of the plugs. Means no leads no losses.
Use a magnetic plug spanner again used for 20+years for motorbikes.
I'm surprised anybody needs to change the plugs on the new C3 yet. Spark plugs should be doing 50~60,000 miles.

 

Have to disagree with the post claiming that spark plugs should last 50-60K miles. I believe that the scheduled change interval specified by Citroen for the Cactus is 32k miles. Additionally my DS3 has a plug change at 40k intervals

 

Service interval isn't service life!
E.g timing belts get changed at x miles or 10 years. But you can't say it will definitely fail at x miles or 10 years common sense would say change it before this. It should last longer than that

 

Service interval isn't service life!
E.g timing belts get changed at x miles or 10 years. But you can't say it will definitely fail at x miles or 10 years common sense would say change it before this. It should last longer than that

Ha..not if it's an Alfa V6..timing belt was 72K change, after numerous expensive engine-failures within warranty. But i get your point

 

The Abarth 500 plugs are very deep and a real PITA as the plug bore walls are very tight/ narrow so a "normal" spark plug socket simply doesn't fit. In the end I used a 250mm long spark plug socket with extension!

Ref the plugs and again on the Abarth 500 the intervals are 36k miles the only reason it is so high is because they use iridium tipped plugs at £34 +VAT each. Funny old thing a cheaper alternative was found!

 

Iridium plugs! aaaahhhhggg!

They were all the rage a few years ago in the bike world. A forum I was on everybody tried them.
Biggest problem seemed to be to buy a set of four (4) and all of them work from the start, or one or more failed after about 1000 miles.
Think everybody skipped them and went back to standard NGK's. :shock:
There's only so many times you can take a fairing and tank off before the humour dries up especially when way more expensive!

 

Agreed...

They were inherently cost prohibitive (£163.20 ex fitting!) and swapping them for normal cheaper NGK plugs (£19.99) offered no different day to day driving characteristics.

Chasing thousandths of seconds around a track they may provide a benefit, but if I'm honest on a run to Sainsbury's I couldn't care less! :lol:

 

Try it on a Citroën CX 25 GTi