a standard spark plug should last 10-20K KM...those better/performance type should last 30-50KM....
Spark plug is wear and tear part...
Also life span of spark plug depend on your engine condition...if your engine makan engine oil / wrong tuning then your spark plug will wear out faster.
I am into semi performance, normally cruising and once in a while will tekan.
I also care about FC and most importantly grip. I never speed when raining so Im not really interested in wet grip tyres. My mom was using...