What mixture should be used to fill the engine coolant reservoir?

Question

DentroTest · Accepted Answer

The correct answer is with water and antifreeze. Coolant is a chemical solution (usually ethylene glycol) mixed with distilled water. This mixture is vital for three reasons: 1) The antifreeze prevents the liquid from freezing at low temperatures (winter), which could crack the engine block. 2) It raises the boiling point to prevent overheating in summer. 3) It contains anti-corrosive additives that protect the system's metal pipes. You should never mix it with fuel (fire hazard) or use plain tap water (risk of limescale and rust).

What mixture should be used to fill the engine coolant reservoir?

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