[Renthorin]

I have been running 110 leaded for about a tank and 1/2 now. Love the smell and it is the only high-octane close to me.

I was cruising the Woodward Dream Cruise area last night for about 4 hours which means I was basically idling for that long.

I stopped to get a bite to eat and noticed that the insides of my tailpipes were very light gray. I wiped my finger in there and it came off easily.

My Check Engine light came on towards the end of the cruise but went out when I got on the highway. It would come on again a few times on the way home but the car ran fine.

is all the gray powder and the CE light from the leaded fuel? I got a denso O2 sensor as I heard they last longer but I have only put on about 350-450 miles on this one.