Can anyone tell me the pros & cons of going with a platinum spark plug
over a regular copper one? Same question for the super-high-end iridium
plugs.

Yousuf Khan

On Oct 9, 3:03*am, Yousuf Khan <bbb... (AT) spammenot (DOT) yahoo.com> wrote:
extended change interval - maybe last 3 times longer.

I don't think there's anything else.

?????

On Fri, 9 Oct 2009 05:26:37 -0700 (PDT), 1 Lucky Texan
<alckytxn (AT) swbell (DOT) net> wrote:

therefore MAY fire more reliably. They are more resistant to fouling
(slightly)

As far as Plats are concerned, if the engine is waste-fire (double
ended coil) using single platinums is a waste of money - dual
platinums are required to do the job properly.

My beaf with the long life plugs is unless you pull them to check them
at about half life, there is a good chance they won't come out, at
least in one piece, when required.

1 Lucky Texan wrote:
So the hype is warranted?

Yousuf Khan

clare (AT) snyder (DOT) on.ca wrote:
The single platinums were only $1.50 more than the non-platinums, so the
cost is no big deal. Why are dual platinums required? What's the difference?


Doesn't anti-seize lubricant prevent them from having trouble coming out?

Yousuf Khan

On Fri, 09 Oct 2009 19:11:41 -0400, Yousuf Khan <bbbl67 (AT) yahoo (DOT) com>
wrote:

The platinum tip is designed to keep the electrode from "eroding" due
to electron transfer (I think that's what it is called) - with waste
spark half the plugs fire backwards - so it is the gtound electrode
that "erodes" - dual plats have platinum wafer on both electrodes.
It helps. Too much can cause other problems (like misfire)
I've seen plugs installed with antiseize that would not come out 5
years later.

Yousuf Khan <bbbl67 (AT) spammenot (DOT) yahoo.com> writes:

I've been told they're bad news in these engines and to stick with a
regular NGK.

--
Todd H.
2001 Legacy Outback Wagon, 2.5L H-4
Chicago, Illinois USA

On Oct 10, 12:17*am, sub... (AT) toddh (DOT) net (Todd H.) wrote:
my wife's Outback (H6) has them from the factory.

???

On Oct 10, 1:17*am, sub... (AT) toddh (DOT) net (Todd H.) wrote:
Second question, is it worth my time to try to change my own spark
plugs? Today I tried doing it, and found everything was too cramped.
Is this something that's easier done from underneath? A few of the
wires were easily accessible, mostly the front cylinders, but the rear
cylinders seem to be highly congested. I left them alone for now,
awaiting opinions. Mine's an 2.5L H4 too.

Yousuf Khan

On Sat, 10 Oct 2009 15:01:58 -0700 (PDT), YKhan <yjkhan (AT) gmail (DOT) com>
wrote:

don't have a 6 cyl mystique, or a PT Cruiser, or a V6 TransSport, or a
6 cyl Aerostar.

A Soob is EASY to get at in comparison any of them.