C5 spark plugs 1.8

[birksy]

Is it worth replacing the sparks with iridium ones or is there a negligible difference on this sort of engine?

[Clogzz]

Not worth the expense and won’t make a difference.
Electronic ignition sparks through anything and current ordinary plugs last 40,000 miles.
If the car always starts on four cylinders, the plugs are good.

The underside of the bonnet has a panel at the front with the original plug type.
Mine says Bosch FGR8ME for the 2 litre engine.
There are other plug makes, and it’s no sin to use them.

[birksy]

Ta very much. That's sorted.

It's easy to be all overcome with techy babble but in the real world I doubt that the sparkers would make anything but an ever so slight effect on economy (and certainly never enough to justify the cost) in a standard engine/car.