Just wondered what sparkplugs people are running as mine are due for changing as having a few issues.
Its currently got NGK BKR7E in it
Been reading a fair bit about platinum etc… but thought best to ask other owners than just guessing.
I’m currently on Denso IK22 5310 Iridium, which I’m very happy with 
I fitted the Champion ones referenced in the owners manual. Can’t remember the part number. The car did appear to run better with them. I did not see the point of iridium or other magic plugs as my S1, like most others, does not do a big mileage. I am more likely to change them as they are fouled up than the magic plugs have reached their 60k plus mileage life.
Yeah - I avoided Iridiums as well - can’t see the point for our driving.
I’m using the NGK equivalent… car seems to run just fine