What is the boiling point of Shell antifreeze?
2 Answers
The boiling point of Shell antifreeze is 106.5 degrees Celsius (at normal pressure). The key parameters for antifreeze are boiling point and freezing point - the lower the freezing point the better (e.g. -35°C is better than -30°C), while the higher the boiling point the better. The full name of antifreeze should be antifreeze coolant, meaning coolant with antifreeze function. Antifreeze prevents the coolant from freezing and cracking the radiator or damaging the engine cylinder block/head when parked in cold winter. Antifreeze is a special additive-containing coolant mainly used in liquid-cooled engine cooling systems. It has excellent properties including winter antifreeze protection, summer boil-over protection, year-round scale prevention, and corrosion resistance. Vehicle antifreeze generally needs replacement every 2 years or 40,000 kilometers - this is just a reference interval. For commercial vehicles with longer mileage, the replacement cycle should be shorter. Since each vehicle's operating conditions differ, replacement should be based on actual usage. Regularly check the antifreeze condition: replenish immediately if insufficient; if suspended matter, sediment, or deterioration/discoloration is observed, replace promptly and clean the system.
I checked the data on Shell's official website, and their antifreeze generally has a boiling point in the range of 110-130°C, depending on the specific model. For example, the commonly used Shell long-life antifreeze has a boiling point of about 112°C at 50% concentration, and it can reach 130°C at full concentration, which is significantly higher than pure water. The key point is that a higher boiling point means it's less likely to overheat during summer traffic jams. Last year, I encountered a major traffic jam on the highway, and the coolant temperature warning light didn't even come on—seems like choosing a high-boiling-point antifreeze was indeed a wise decision. Antifreeze also needs to consider the freezing point; preventing freezing at -35°C is crucial, especially in northern winters where temperatures often drop below -20°C.
