OXS for 86 coupe

[Hiok-Tiaq Ng <htng@aries.ece.cmu.edu>]

I have decided to keep the OXS sensor that's still in the car,
because the mpg's still fine accounting for the oxygenanted gas
and the fact that there's no carbon build up in the tail pipe.

However, the question that I have still remains, when I do need
to get a new one, is it the single lead or tri-leaded one? 
Thanks everybody.

Tiaq

ps: this mail previously bounced. sorry if there are multiple copies.