Why your car needs periodic long-distance drives
Jonathan Kasule, a mechanic explains that it is a disservice for a diesel vehicle to be confined to covering short distances.
Drivers being trained on the car engine. (Photo by Ahmad Muto)
By Ahmad Muto
Journalists @New Vision
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Diesel cars are not common in Uganda, especially in the passenger car category. However, because the majority of cargo vehicles are powered by diesel engines, they are common in the long-haul category.
They, therefore, cover long distances by default. They pride in higher compression ratios compared to petrol engines, higher torque, and, therefore, higher power development. Diesel engines are essentially built for long distances with guaranteed fuel efficiency.
However, the setback for those with diesel-powered cars that are confined to city runs of a few kilometers from, say, home to work, school, shop, and running errands do not get the benefit of fuel efficiency.
Jonathan Kasule, a mechanic explains that it is a disservice for a diesel vehicle to be confined to covering short distances.
Samuel Ssenvuumo, an automotive technician, observes that the engine can cover short distances, but it is impossible to reap the benefit of fuel efficiency.
He says while driving on a highway, the engine responds better after a while.
“If you are on a highway on a long-distance journey, the engine feels more efficient after certain mileage. It enables the clearing of soot in the system. Once in a while, drive over 100km to 200km which helps to clear soot in the diesel particulate filter (DPF). Motorists with such cars should occasionally drive them on long journeys,” explains Ssenvuumo.
On the other hand, Umar Kasujja, another mechanic explains that short distances clog the engine. This is not only true for diesel vehicles, but also those that use petrol. Long distances help the vehicle to clear soot to improve efficiency.
He also adds that the optimum running temperature of the engine can only be achieved if it is subjected to long distances.
“When the normal running temperature of the engine is achieved, fuel consumption reduces and the engine becomes more efficient.So, when it does not reach the normal running temperature everyday, the engine becomes less efficient,” explains Kasujja.