Step 1: Add water to the first water fill line.

Step 2: Add 1 drop of dememulsifier only.

Step 3: Add mixed fuel to gasoline fill line.

Step 4: Close cap, ensure that it is firm, then place index finger on breather hole.

Step 5: Shake well gently and let fuel sit for up to 5 mins.

Step 6: Determine ethanol content with flex fuel percentage.