Coolant or antifreeze: what it is, what it does and how often to change it
Coolant and antifreeze are the same thing, and they do a silent but vital job: keeping your engine from freezing in winter or boiling in an August traffic jam in Málaga.
What it really does
It keeps the engine at its ideal temperature and protects the circuit from the inside against corrosion. Without it, the engine overheats, and that can end in serious damage.
It’s not just “coloured water”: it carries additives that run out over time. That’s why it needs renewing.
How often to change it
It depends on the antifreeze type, but it’s usually every 2–5 years or 60,000–150,000 km. Your car’s data has the final word.
More important than the exact date is not mixing incompatible types: doing so can form sludge and clog the circuit.
What about colour? Can I add water?
The colour hints at the technology (G11, G12, G13…), but the manufacturer spec rules, not the shade.
Plain water only as an emergency fix: it doesn’t protect against corrosion or freezing and boils sooner. Refill with the correct coolant as soon as you can. Discover our coolant change in Málaga and, while we’re on fluids, also check the brake fluid.
Key takeaways
- Coolant = antifreeze: prevents freezing and overheating
- Guide interval: 2–5 years or 60,000–150,000 km
- Never mix incompatible types
- Plain water is only an emergency fix
Frequently asked questions
What if the coolant level is low?
A low level raises the temperature and risks the engine. It may be normal consumption or a leak. Get it checked soon; we inspect level and circuit with no obligation.
