[svandamme]

30 k miles, i'de replaced em long before interval wise.. preempt the misfires and ensure smooth removal.

i'm with asphalt on the wires, but replacing plugs don't hurt to try first if they are over 20k miles.


What kind, well, I figure a broken primary cat or secondary cat or engine costs way way more then the plugs.. and so far i've found plugs for my cayman online at considerably better prices then most sites have em.. I get bosch at 8 euro a pop.. I mean what's 48 euro every 2 years for a Cayman ? peanuts really
I used them
Heavy duty yttrium-enhanced center electrode with copper core .. But I have no idea bout older other cars so other then "don't let price make the decision" i got nothing