Mercury Villager Oxygen Sensor Replace/Remove

Is It Safe To Use Rubbing Alcohol In The Gas Somebody Told Me It Helps The Engine Also Have Replaced An O2 Sensor Twice And The Same Codes...

Replaced Catalytic Converter And Front Oxygen Sensor. Replaced Rear Oxygen Sensor And It Would Not Idle. Put Old Sensor Back On And It Idles...

Engine Performance Problem 1993 Mercury Villager Front Wheel Drive Automatic I Changed My Maf Sensor Cause The Car Had A Real Bad...