I have been running alky for 3 years and 65k miles on the car and i have all the teflon. I believe the teflon coating is luck of the draw. Some people it just come off even with nothing being sprayed. Some people run all sorts of things carb clearn, xylene etc thur it and it stays on the rotors. Now with the alky does do is help clean the chambers. https://www.alcohol-injection.com/fo...fits-1212.html