My order of Kreen shipped. Came with a free can of Aero Kroil. On the can: Directions Put a pint of Kreen in the gas and another in the oil every 1000 miles. Complete Purge Directions: When the motor is badly clogged with carbon and using an excess amount of oil, it needs a Kreen purge. Remove the plugs and squirt about an ounce of Kreen into each cylinder. Replace the plugs and turn the motor a few times with the starter. Then let it rest for at least half an hour-overnight if practical. Add a quart of Kreen into the old oil and a pint into each five gallons of gas in the tank, and run the motor half an hour or longer. drain and fill with fresh oil. Plan to use a pint and run for 1k at the end of the next OCI coming up shortly. Did anyone use it differently than the instructions? How did it work for people?