BG CF5 is a fuel deposits that build up on intake valves, ports and in combustion chambers in high-efficiency engines can cause serious drivability problems. The most common of these problems are rough idle, loss of performance, reduced fuel mileage and engine knock. Also, water, oxygen, and sulfur are often present in varying amounts in the fuel we use. Even trace amounts of these contaminants can lead to oxidation and corrosion in storage tanks and fuel systems. BG CF5 fuel system cleaner prevents deposits throughout the entire fuel system. Added at each oil change, it will keep injectors, pistons, fuel intake components and sensors clean and free of damaging deposits and corrosion. BG CF5 - Restores fuel economy, - Restores horsepower, - Prevents increased harmful emissions, - Maintains engine performance. BG CF5 restores power and efficiency and protects against the harmful effects of ethanol. BG CF5 is an excellent fuel stabilizer and is catalytic converter and oxygen sensor safe.