Oxygenated fuels, and oxygen sensors

Factual Questions
1

An oxygen sensor in your car allows the engine to sense whether or not the air/fuel ratio is too lean or too rich, thus saving the atmosphere, excess fuel consumption, and possibly engine damage.

Oxygenated fuels add oxygen to the fuel to aid in combustion, producing cleaner exhaust.

Wouldn’t an oxegenated fuel through off the sensor and actually make the engine run richer, thus creating more pollution?

2

Not really richer as the ox-fuel contains oxygen and therefore is correctly balanced. (it does burn more stuff that is in your tank but that contains more oxygen and therefore the oxygen can’t be considered ‘fuel’).

The idea is that oxygen is more evenly distrubuted in the fuel mix and hopefully will burn more completly.