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 would need help here. Recently my radiator is damaged, according to my foreman, a replacement is needed. But he can't find any stock radiator replacement.
http://www.shelbysupercars.com/images/world-record.jpg
Shelby Supercars (SSC), manufacturer of the ultra high-performance Ultimate Aero Twin Turbo, set the new "World’s Fastest Production Car" record earlier today...