Spark plug choices?!

I have fitted a few makes all listed as compatible. Bosch, nickel and iridium NGK,  Beru.
The common factors have been they all worked fine and offered no noticeable difference in MPG or performance.
As stated the only difference is expected plug life. The nickel plugs are rated for 10k miles, although they can last longer. The NGK Iridium plugs are rated for 40k plus life.  I am currently using a set of NGK Iridium plugs to see if they live up to the claim,  so can't confirm at the moment.
The Beru plugs I used are only good for about 15k miles, so not much better than the nickel plugs.
Iridium is ideal for vehicles with hard to reach plugs as there cost is offset by the labour cost to change them. This is not really an issue on a Jimny, if you service yourself every year and cover less than 10K then nickel plugs are fine. Higher milage or just a dislike of changing them makes Iridium the better choice.

 

This is why I use them. In conjunction with my k&n panel air filter and an average of a thousand miles a month it reduces my service time for intermediate services to just an oil and filter change every 9 months. The air filter has paid for itself many times over as its washable every 100k, the plugs save time and wear and tear as I'm only disturbing them every 3 years. That said I suspect even then they would probably go longer as they are always perfect when I replace them, but I don't want to risk that as you can go too far and it becomes neglect.

Great, thanks all - useful advise. I've got the filter to collect from ECP so will stuck an order in for some NGK cheap plugs just now as I have no idea when the car was last serviced.

Any ideas on my engine code from previous post? I did a bit more reading and believed the way to tell if vvt is the bump at the front left of engine as you look at it, which I don't have, so assuming it's a non vvt m13?

You are correct, you are missing the VVT bump.

OK, got me some NGK BKR6E plugs, came up on ECP under my reg and cheapest at £2.98 before discount. Guess I should double check plug gaps even though most stuff I've done in the past 20years has come pre gapped -  anyone know what they should be?

No matter, services it today and just chucked the plugs in, all running fine. Easiest car to service I've worked on in a while! Filter and drain plugs are in a really handy location, small plastic takeout box to catch oil from filter job done.