I just replaced the plugs in my new motor, they were Bosch Super
Tri-electrode W7DTC and pretty worn out after only 13k mikes.  They had
good color, not sooty or burned up, just worn out, the center electrode
was worn down to a triangle with the gap way to large.  This is the
first time I've used Tri-electrode supers in my van, I used standard
Supers before.  What kind of mileage have some of you gotten out of your
Super Tri-electrode's?  What experience has anyone had with the Platinum
+4's?

dave
dave@251.org