Will a small amount of oil in the antifreeze harm my car?

A small amount of oil in your car's antifreeze will not cause immediate damage to your engine, but it can lead to long-term problems. Oil in the coolant can cause the antifreeze to break down, which can corrode the metal parts of your engine and lead to leaks. Additionally, oil can clog hoses and radiators, reducing the efficiency of the cooling system. If you notice any signs of oil in your coolant, such as a brown or milky discoloration or oily residue on the surface, it's important to flush the cooling system as soon as possible to remove the oil and prevent damage.