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Since 1989 the coolant type listed is ethylene glycol. How does ethylene glycol (EG) compare with propylene glycol (PG)?

April 26, 2017compare coolant ethylene Glycol PG Propylene type

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Since 1989 the coolant type listed is ethylene glycol. How does ethylene glycol (EG) compare with propylene glycol (PG)?

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A6: Ethylene glycol and propylene glycol are clear liquids used in antifreeze and deicing solutions. Both are clear, colorless, slightly syrupy liquids at room temperature. Ethylene glycol is odorless, but has a sweet taste. Propylene glycol is practically odorless and tasteless. Ethylene glycol is toxic. Eating or drinking ethylene glycol can result in death, while small amounts can result in nausea, convulsions, slurred speech, disorientation, and heart and kidney problems. Ethylene glycol affects the bodys chemistry by increasing the amount of acid, resulting in metabolic problems. Similar to ethylene glycol, propylene glycol increases the amount of acid in the body. However, larger amounts of propylene glycol are needed to cause this effect.