I have always used iridium from the start so not much to compare with in terms of performance what would be the difference, the benefits don't need cleaning like I don't open the plugs for more then 20000 k.m just clean them after 20000 km and then change them after 60000 km
This is the second pair of iridium I am using since I have bought the car
Rest the cars pick is great Alhumdullillah, fuel average has always been 10 km/l from the beginning uptil now