I've been using the Bosch plugs with three electrodes.  They are what is
called for in my '85, and they have worked very well.

I think the theory is that whichever electrode has the least resistance will
receive the spark,  thereby letting the plug run cooler (hotter metal = more
resistance?).  I got 100,000 miles out of the last set, after which the
center electrodes were kind of eroded to nubbins.

Karl Wolz

-----Original Message-----
From: Walt Spak <wnsopc3@3RDM.NET>
To: vanagon@GERRY.VANAGON.COM <vanagon@GERRY.VANAGON.COM>
Date: Friday, January 29, 1999 2:05 PM
Subject: Re: Bosch or NGK plugs?

Per,

I use NGK plugs in all my equipment.  My experiance with Bosch is that when
they start to get old, they go bad very rapidly. The NGK seem to have the
same level of performance  right through the time that I replace them.

Walt Spak
wnsopc3@3rdm.net
Pittsburgh, PA.