Saturn Aura potential antifreeze contamination in engine with oily milky residue on dipstick and oil cap on Saturn Aura

Some Saturn Aura owners report experiencing antifreeze contamination in their engine, indicated by oily milky residue on the dipstick and oil cap. This issue can lead to symptoms such as milky oil, white smoke from the exhaust, reduced engine performance, overheating, and coolant loss. A common cause of this milky oil is a coolant leak, where coolant seeps into the engine and mixes with the oil. If left unaddressed, milky oil can result in significant engine wear and damage through corrosion, potentially leading to engine failure. To resolve this issue, owners are advised to check for moisture, inspect for a broken head gasket, and perform high-pressure washing, along with flushing the contaminated oil and repairing any damaged components. Prompt attention to antifreeze contamination is crucial for maintaining the health of the Saturn Aura's engine.