O2 sensors..

[Craig Pugsley]

Hi there,

FYI, Seen over on the GN list (Regarding O2 sensors w/leaded fuel):

O2 sensors...
When that heated sensor finally does fail on leaded fuel clean it
real good with brake cleaner and you might revive it and get
even more use out of it.   However the Zirconia sensor is subject to
failure and drift when subjected to lead.   The heated Zirconia
sensor should last many (10+) times longer than without the heater.

NTK/NGK makes a TiO2 (Titania) sensor that is almost completely
immune to lead contamination.  However, it has a 12mm thread and
requires an adaptor and a compensation resistor for proper
installation replacing a Zirconia based sensor, unless you can find
one of the rare 18mm TiO2s.  The TiO2 also has a much smaller
sensing head for less exhaust obstruction.  I wish I knew part
numbers for you all.  Call NTK/NGK and maybe they can help
(anyone speak Japanese?). The 12mm TiO2 is a current production
part for one of the Nissan Pathfinder engines but which one?

Craig.