Hey so I have a 2018 K13 model of the Micra with the manual transmission I'm sitting at 74,950km and I finally decided to replace the spark plugs on it. And I must say, idk if it's just new plugs in general or the fact that I spent extra on NGK Ruthenium HX plugs but it fires up instantly without any delay even after a cold winter morning, it's alot smoother at idle and at say 3000rpm then the day I bought it. The throttle response is full and clean. I might be talking to talk here but I would highly recommend anyone looking into new spark plugs to give the NGK Ruthenium HX a go. It's a game changer