"Daniel" wrote in message
> platinum - 60,000 miles
> iridium - 90,000 miles
Fine but my platinum plugs in my 99 Camry 6 cyl. are coming up to that
60,000 miles marker and I notice no decrease in performance. Any problems
with delaying their replacement? Someone mentioned, offline, that the plugs
could get "seized" into the block if left in too long!! Go figure.
> >> Stay informed about: how often to change spark?