Update:
Went to 30% Hydrogen Peroxide food grade, keeping everclear 190 proof with aspirin ground with mortar and pestle for 12 hours before adding peroxide. Try to add the peroxide within an hour of filling up the tank, and i'm adding 2 small eye droppers full.
Last tank of city driving, both my wife and I over 2-1/2 weeks with ECO button OFF. 425.1 miles and the tank wouldn't tank more than 11 gallons. This car loves premium with the mpg hooch (as my wife calls it), but 38.6 mpg is nothing to sneeze at. EPA estimate for this car in the city is 28, thats a 10 mpg increase with nothing but the remedy.
If I wasn't in the last 5 weeks of the semester I'd be driving up to see Dan for a top groove on this baby after I put in the lower groove.
Time needs to be my friend.
Ken