I know a guy who recently changed plugs in his new swift i dont know weather oem ones are platinum or diamond but he bought copper plugs ngk ones for 900rs new and he never complained about under power issues i know you never felt any difference by installing iridium plugs neither have i and just becus swift comes with iridium that doesnt mean the engine wont work with others iridium is basically less of a USE and more of a MARKETING thing
anybody who is going off the hook again and again arguing needs to read my post which i just posted before this one
read it and try to understand wat i wrote
