BG Ethanol Fuel System Defender PN 213 BG Ethanol System Defender protects the fuel system from the harmful effects of ethanol. It keeps intake manifolds, intake ports, intake valves, and combustion chambers free of deposits caused by ethanol. When gasoline is blended with ethanol, it can wreak havoc on engines. Ethanol increases engine deposits, affects drivability, leads to corrosion, and eventually component failure. Deposit and corrosion formation cause engine efficiency and durability to plummet. BG Ethanol Fuel System Defender guards fuel systems from the damaging effects of ethanol gasoline. Added by a professional at every oil change, it protects intake manifolds, intake ports, intake valves, and combustion chambers from the damage caused by ethanol oxidation. Prevents fuel degradation Restores fuel economy Restores horsepower Prevents increased harmful emissions BG Ethanol Fuel System Drier PN 281 BG Ethanol Fuel System Drier defends engines against the water that accumulates in ethanol-blended fuel. Ethanol-blended fuel is hygroscopic, meaning that it absorbs moisture. If left untreated, this moisture can cause corrosion on fuel system components, leading to erratic engine operation, and microorganism growth that plugs fuel filters. BG Ethanol Fuel System Drier is a professional-use product that holds the water drawn in by ethanol in suspension, forming a stable solution. This allows the water to pass through the fuel system with no harm to combustion.