Over a week now since last engine light was last reset:
Still no check engine light coming back on
It actually feels as if each day the car is becoming faster and smoother and the exhaust gasses don't smell of much now.
Less and less pedal effort is required to make car move now
Hopefully it will become more economical too !
Can't believe I was putting up with them smelling so rich before oxygen sensors were changed, as several of you advised me to.