SPARK PLUG: when to replace

[aejhayl17]

I think spark plugs should last 20,000 miles on controlled tests
to be permitted for manufacture.

base sa mga nabasa ko dati,

regular plugs should last at least 20k km
platinum should last at least 40k-60k km
iridrium maximum of 100k km

parang ganyan, di ko na maalala kung saan ko nabasa. dito din sa tsikot yun e