As far as spark plug, yea I took their platinum offer on the reason it'll go 100k km and yes they went that far before a replacement. I never ask them to service the plug or they asked. Thing is, people at service center are so used to normal procedure that they tend to instinctively follow the checklist or yes, they wanna sell and not doing charity.

If you guys happen to sesat to Kelantan and in need of P2 service then go to Nasrom Perodua service at Chica, Kubang Kerian. This center has been seing my car for at least 6 years already.