I use the Chevron with techron stuff or seafoam in the gas tank. Haven't had any issues or that specific check engine light... this car is actually quite weird as I had boost/vacuum leaks with the intake manifold gasket, throttle body gasket and valve cover gasket and had surges at idle but never a check engine light on this dang car.Just another update... I have had the code steadily since my last update here at 110k miles. Now I am at 125k miles and it went away again.
There was a deal on "3M complete fuel system cleaner" and I have never put anything in my tank since I bought it brand new so I figured it couldn't hurt anything to run something in there so I got it. Its normally really expensive but apparently worth it since my CEL went away after running it for 3/4 of a tank. No other changes besides running this in my gas tank, I filled up at the same gas station as I always do with the same grade of fuel and same commute and everything.
I'll update this thread again if or when the light comes back on.