I ran a set of the Bosch tri electrodes in my '85 for just over 100,000
miles.  The electrode was worn down to a nubbin, but the sucker kept
running, and running well.  19-20 mpg and good power.  Passed emissions
easily.  replaced with the same plugs, and no noticeable improvement in
drivability or economy.

Why did I run these plugs so long?  Duhh, I forgot to change them?

Karl Wolz

----- Original Message -----
From: Dave <dave@251.ORG>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Thursday, October 21, 1999 10:36 PM
Subject: Re: Bosch 4-pronged spark plug not for Vanagons?

> What plugs did the rep reccomend?  I am running Bosch Tri-electrode supers
> in my 2.1 and it seems to eat the plugs in about 20-30k miles.
>
> dave
>
>
> >Thanks Ken, but after talking to the Bosch tech rep, I am staying away
from
> >the 4-pronged plug.  Bosch tested the plug in all possible engine
> >applications, including the Vanagon, and it did poorly in the Vanagon,
> which
> >is why the parts stores show no listing for it in the Vanagon.  The tech
> rep
> >said to not use them in Vanagons.