I Need Help

Thank You to everyone. I did compression test and 160 all four cylinders. C16 adversly effects o2 sensor, so I am going to go through allot unless I tune to 92 octane. I am stupid and tuned the car on dyno to only C16 this year. Also I am going to go through spark plugs on a regular basis using c16. Warning to anyone using c16. Safe anti knock fuel and car will not pull timing, more power, but check plugs and o2 every short while. I know probably everyone knows this allready, I learned the hard way.