It's not true that diesel cars can't travel on highways. This claim may stem from a misunderstanding of diesel vehicles' characteristics. In fact, diesel vehicles have unique advantages and performance at highway speeds.
First, diesel engines rely on compressed air to heat up the diesel mixture. This combustion method allows diesel engines to achieve a higher compression ratio and greater torque output. Therefore, diesel vehicles often provide ample power at highway speeds, especially during acceleration and overtaking.
Second, diesel has a higher energy density than gasoline, meaning the same volume of diesel delivers more energy, resulting in superior fuel economy. Numerous real-world tests have also shown that diesel vehicles have relatively low fuel consumption at highway speeds, a significant advantage for long-distance highway driving.
Of course, diesel vehicles also have some issues to be aware of at highway speeds, such as relatively high noise and vibration, which can affect driving comfort. However, with continuous technological advancements, modern diesel vehicles have made significant improvements in noise and vibration reduction.
Furthermore, diesel vehicles' fuel injection systems are highly sophisticated, requiring high fuel quality. Therefore, when using a diesel vehicle, you need to choose fuel of better quality to ensure the normal operation of the engine and extend its service life.