The PENRAY Isopropyl Fuel Line Antifreeze in a 12 oz capacity prevents frozen fuel lines, ensuring smooth engine starts even in cold weather. Its formulation improves combustion efficiency, leading to optimized fuel usage. Compatible with all types of gasoline, it offers versatility for different vehicles. The fast-acting formula provides immediate protection against freezing, while the simple formula is safe for catalytic converters and oxygen sensors, ensuring no harm to essential components.