It is my understanding lead will gum up an O2 sensor. Is there a device that accomplishes the same thing that is not affected by lead? I was going to plumb up a couple of cheapo O2 sensors in my 6.3 to measure the voltage (mixture) as a por boy method requiring the addition of the bung holes in the down tubes. I have access to leaded gas which I plan to mix with premium unleaded to get to an octane of about 96 for my hot summer driving.

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