Maintaining Levels in Tank

[Potatohead]

Car exhaust contains both

Anything is poisonous in high enough concentrations but carbon monoxide is MUCH more poisonous than carbon dioxide

[maron6977]

Originally Posted by Potatohead

Car exhaust contains both

Anything is poisonous in high enough concentrations but carbon monoxide is MUCH more poisonous than carbon dioxide

Yes , correct
Car produces co & hc , then runs thru catalytic converter to produce mostly co2 & water