Usually in the process of daily car maintenance and car use, there will always be this or that operation misunderstanding, and it is the practice that many car owners are Xi to, although it is not right, but everyone is not aware of it subconsciously. In the long run, it may lead to problems of one kind or another in the car.
Therefore, today Lungu will come to talk to friends about some misunderstandings about daily car maintenance and car use, and I hope you can understand and correct the misunderstandings of car use.
Myth 1: The higher the gasoline grade, the better
The gasoline number represents the octane number of the gasoline, so the higher the number of the gasoline, the better the anti-knock of the gasoline. The better the knock resistance, the less likely it is that the engine will feel knocking.
In addition, the proportion of catalytic gasoline, reformed gasoline and anti-explosion agent in high-grade gasoline is also different, but in general, there is no difference in gasoline quality and cleanliness, but it is only suitable for engines with different compression ratios.
Therefore, when refueling your car, the label is not an indicator of quality.
We must choose the gasoline mark of the vehicle itself, too high or too low, will cause unnecessary losses to the vehicle, and there is really no need to skip the level of refueling.
Myth 2: Neutral coasting can save fuel
For models in the early years, coasting in neutral gear can indeed save some fuel, which makes many old drivers develop the Xi of hanging neutral gear when they have the opportunity.
But now, the EFI engine models on the market have become the mainstream, so the answer to whether neutral coasting is fuel-efficient should also be clear: it is not fuel-efficient, sometimes it is more fuel-efficient, and it is not conducive to driving safety.
Myth 3: The darker the color of the film, the more insulating it is
This is a very foolish misunderstanding, the color of the car film is not much related to the thermal insulation performance, because the reason why the car film is insulated, mainly by the thermal barrier layer, not the dyeing layer, mainly through the thermal barrier layer to reflect the heat carried in the sun, so as to block the heat into the car.
The thermal insulation effect of a high-quality car film is not directly related to the color shade, especially the front window film of a car.
In sunlight, the most harmful to the human body is the ultraviolet rays that cannot be seen by the naked eye, so many high-quality films can reflect infrared and ultraviolet rays in different bands by applying particles of special materials, and selectively block different parts of the sun, which cannot be seen from the color shade.
Therefore, when buying, car owners should pay attention to the quality of the car film, rather than the color.
Myth 4: The wider the car tires, the better
Car tires aren't always better as wider. The aspect ratio and pattern arrangement of the tires, as well as the softness and hardness of the tread, will greatly affect the driving and riding experience.
The choice of tire width is a comprehensive issue.
The tires are wider, and there are certain advantages in cornering and braking deceleration due to the high friction.
However, if the horsepower of the car is small, and the wide tires are replaced, it will also waste more horsepower because the tire friction is too large, so that the original small horsepower becomes smaller and the fuel consumption is greater.
So the tires need to be decided according to their driving preferences and conditions of use.
For car owners who like to experience high-speed sports handling, it is worth using wide tires, and for most self-driving car owners, they are still more concerned about fuel consumption and driving comfort, so it is recommended not to use wide tires but comfortable tires with a certain sidewall height.
Myth 5: The more fluids of all kinds, the better
The more the merrier doesn't work everywhere. For example, if there is too much engine oil, it will lead to a decrease in the output power of the car, an increase in fuel consumption, an acceleration of carbon deposits, damage to the three-way catalytic converter, and accelerate the aging of automobile parts.
Many oil reservoirs on the car have scale marks, and the addition range needs to be maintained between the upper and lower limit scales, not too much and not too little.
Myth 6: The thicker the body steel plate, the safer it is
In the old concept, the safety of the body is also related to the thickness of the steel plate used, and the car with thin steel plate is not safe, so we can often see friends who knock on the steel plate of the body at the auto show, they are "judging" the safety of the body, in fact, this is a misunderstanding.
To give you an easy to understand said, the body steel plate is like the wall of our house, the body structure is like the various beams of the house, we see the self-built houses, high-rise buildings, which is not the main structure of the house first built and then start to build the wall, this wall can be built slowly, the house will not fall down, the main stress part of the house is in these structures, not the wall.
In our car, the steel plate is just a surface covering, and the main force part of the body is the structure of the body, and the iron sheet on the surface does not really play a role.
What really matters is the strength of the steel frame, whether it can keep the body intact after a crash, which is an important factor in ensuring the safety of passengers.
Myth 7: Flat-proof tires can be explosion-proof
Can a run-flat really go flat, can it really go on after a run-off, like in the movies? The answer is, of course, yes: no!
Flat-proof tires are just a nickname given to it by many merchants with ulterior motives, but in fact, the real name is: gas loss tires. The characteristics of this tire are between pneumatic tires and solid tires, and they belong to a semi-pneumatic tire.
Although the run-flat tire strengthens the rubber thickness of the sidewall of the tire, it also means that the rolling characteristics of the tire are changed.
Flat-proof tires will also burst tires, but run-flat tires are not as "thrilling" as ordinary tires when they burst, and from the owner's point of view, the difference between the front and rear of a puncture when driving at low speed is smaller.
If a tire burst occurs after getting on the highway, it is not of much significance to prevent explosion.
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Source: Practical knowledge of automobiles