Midwest is MAPCO's brand. With MAPCO, you can trust that you'll always have a ready supply of quality, bulk anti-freeze, available when you need it. Midwest has earned the trust of anti-freeze consumers and has the greatest brand equity in the industry. With the cleansing and protection offered in today's Midwest anti-freeze portfolio, Midwest is committed to being at the forefront of innovation and continues to set the standard for this industry. Antifreeze acts as a coolant for automotive engines. It transfers heat from internal combustion engines and protects radiators in vehicles. Antifreeze protects against engine damage when temperatures drop below the freezing point, which water alone cannot do. Antifreeze also protects engines when they get too hot, causing the coolant to boil, and avoiding corrosion. Also, antifreeze reduces the freezing point of any water that's used to cool your engine. When water freezes, it expands, and without antifreeze fluid, this expansion can cause your engine block to crack and ruin your motor. Midwest is the best antifreeze you can use in your car. Rely on it for quality you can trust!