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Coolant is a specially-formulated chemical liquid, commonly known as antifreeze, that circulates through a car’s engine. It removes excess heat from a car’s engine by passing it through the car’s radiator. Furthermore, the solution contains inhibitors that protect the metal, plastic and rubber in the cooling system from corrosion. And, as the name antifreeze suggests, it also doesn’t freeze up in bitterly cold conditions, so it plays an important role in a car all year long.
Coolant levels should be checked frequently, at least every 3-6 months. Low coolant can cause overheating, which would have serious implications for other components on the car. Even though coolant can leak and evaporate over time, in many cars it often looks as though the coolant never needs changing because its level seems to stay the same. However, draining and flushing the coolant system, including the radiator, at least once a year is important. Flushing pushes out all the old coolant, debris from corrosion and scale. If left in the engine, it may become clogged up, potentially causing extensive damage.
Before a mechanic drains the cooling system, he might add coolant cleaner to the coolant and then start the engine, depending on what the manufacturer specifies. After the car has run for a while, he would turn it off and drain it. He would then add water to flush it and drain it again, twice, before finally putting in the fresh coolant.
Another French company churning out good-looking vehicles, Renault has been in the business of making cars since 1899. The alliance of Renault with Nissan (conveniently called the Renault-Nissan Alliance) make up the fourth largest automotive group in the world.
Renault is also widely known for its role in motor sport, particularly Formula 1. Early work on mathematical curve modelling used on Renault car bodies is an important, but little known, part of the history of computer graphics. Renault began to take part in motorsport early in the 20th century, largely due to Marcel Renault’s own interest in the sport. Over the years, Renault acquired multiple companies with sporting connections, and in the 1970s set up its own dedicated motorsport division, Renault Sport, winning both the Le Mans 24 Hours race and the Renault Alpine A442.
But back to the world outside of motor sport! Back in 2013, the newest Renault vehicles had the lowest average CO2 emissions among European generalist brands, average at 110.1g/km.
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