Antifreeze AG11 Antifreeze from the company Mannol in a 1lt package. It is a G11 antifreeze, ideal for old cars with high-capacity cooling systems. It is ready to use, so it does not need to be diluted before placing it in your vehicle. Its color is blue, indicating the composition used to prevent engine corrosion. You should consult the manufacturer's manual for the color of the antifreeze you will choose.