Because yes, we know: go slow it’s safer and it means saving fuel, but if you abuse excessively relaxed driving, it may end up being detrimental to your vehicle. We are talking about the notable (and numerous) breakdowns that your car can have due to going 100 km/h on the highway.

Which brings us to something very obvious: it’s good to give it a ‘squeeze’ the accelerator once in a while is good for long-term vehicle performance. Or rather; In order not to incur speeds that lead to possible fines, respecting the law, it is recommended that from time to time you forget the highest gear of the gearbox and travel at a faster pace behind the wheel.

The above, designed to relieve the engine and reduce consumption, and use a shorter relationship, which will make the car’s engine work at higher revolutions. Likewise, if what we do is drive constantly at low speed, such as 100 on the motorway or 30 in the city, we can have different problems, among them, for example, that driving like this causes more soot than usual to be produced in the combustion and that it does not burn. But it is not the only one.

In this sense, most of the problems that our car suffers from this misconduct refers to taking for lubrication failures: excess, defect or poor quality of the oil; or excess carbon that clogs the turbo limiting its operation, among others.

That is why this point is so important to watch out for, and one that we have to take into account since it affects the mechanics of our cars. Let us remember that in the city speed is limited to 20 km/h on roads with a single common carriageway, 30 km/h on roads with only one lane in each direction and 50 km/h on those with two or more lanes….

As we reflect, the component that is most likely to be damaged by this driving habit of driving at 100 on the highway is the particulate filter. Driving at a medium/low speed causes more soot to be produced during combustion than usual and it does not burn.

Therefore, this goes to the filter, which retains it so that it does not go outside and the accumulation will be greater, which will cause the system to carry out automatic regenerations, so it will suffer greater wear and give failures.

With certainty, the change of gears is the element that is going to be affected the most, since driving constantly at such a low speed will always make it roll in short relationships and with constant changes between first, second and thirdcausing greater wear on the clutches.

According to Euromaster, the specialist in comprehensive vehicle care and maintenance, the repair or replacement of this mechanical part can cost up to 2,000 euros.

Similarly, soot not only affects the particulate filter, it is also the main cause of failure of other very expensive mechanical elements, including the EGR valve.

The EGR valve is responsible for gas recirculation and its function is to reduce polluting emissions, especially NOx. For this reason, all new diesel cars have it and it is becoming more and more common in gasoline cars.

In parallel, this constant management of change forces us to step on the clutch many more times, with which it is a very expensive organ, about 1,000 euros, which we are going to deteriorate before, without the slightest doubt. In parallel, they will suffer the brake padsbecause we have to brake more often.

Engine cooling is also not going to be good because ventilation is not going to be adequate due to lack of speed. Which can bring heating problems.

Another negative aspect of the limitation (on our part) of driving at a speed of 100 km/h on the motorway or 30 km/h in the city, although not related to mechanical breakdowns, is the increase in fuel consumption.

The moment in which an engine requires a greater amount of fuel is when starting from a standstill and at low speeds, since it has to drag all its weight from zero, which is why shorter gears are required and with increased drag force. For this reason, driving constantly at low speed and with continuous stops can trigger fuel consumption.

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