A simple test can be done to screen for the presence of methanol or ethanol. All that is required is a transparent container (something like a fuel strainer, test tube, or graduated cylinder) and a small amount of water. First, add a small amount of water to the container and mark the container at the water’s highest level. Next, add about nine parts gasoline to the one part water (i.e., one ounce of water, nine ounces of gasoline). Cover and shake to allow the water to mix with the gasoline. After mixing, let the water and gasoline settle. If alcohol is present in the gasoline, the water will absorb it, and the amount of water will appear to increase, indicating the gasoline should not be used in the aircraft. However, if the water level remains the same, no alcohol is present in the gasoline, and it can be used in the aircraft.