Bro, seriously how many bottle do I need to FULLY clean up the carbon in combustion chamber for car mileage over 15xxxx km? Coz I dont think 1 bottle is enough.
actually how often do u need to start the car or run the car in order to keep the spark from drying? im not sure is bcos the spark plug drying that cause the car hard to start after a long time didnt start or some...