What is the detailed explanation of automotive engine oil grades?

What does driving illusion include?

Driving illusions include light illusion, slope illusion, distance illusion, and curvature illusion. Light illusion: Strong sunlight mixed with the shade of trees on both sides of the road, alternating between bright and dark, can easily dazzle the eyes, creating a light illusion that leads to operational errors. In addition to sunlight, the glare from reflective objects, the strong light from high beams during night driving, and the glare from oncoming vehicles can all make it difficult for the driver's vision to adapt momentarily, causing a light illusion. Distance illusion: While driving on the road, drivers may sometimes misjudge the length of oncoming vehicles, the distance between vehicles during a meeting, or the following distance, leading to insufficient meeting distance or too close a following distance, resulting in accidents. When meeting another vehicle, no matter how great the speed difference between the two vehicles is, the meeting point always seems to be at the midpoint between the two vehicles.

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What does it mean when the check light on the dashboard is on?

When the check light on the car dashboard illuminates, it indicates an issue with the engine's electronic control system. The check light is the engine malfunction indicator light. According to the driver's manual, when this light comes on, you should promptly take the vehicle to a 4S shop for inspection. Here are some common causes for the engine malfunction light to illuminate: Dirty throttle body or fuel injectors; excessive engine carbon buildup; leaks in the intake system, crankcase ventilation system, or secondary air system; clogged catalytic converter, damaged oxygen sensor; use of substandard fuel. Engine issues: Problems in the engine's electronic control system may affect normal engine operation. If the malfunction light turns off briefly but comes back on after driving for some time, it suggests an engine problem that requires timely inspection and repair.

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What are the regular maintenance items at a 4S shop?

Regular maintenance items at a 4S shop include engine oil maintenance and brake maintenance. Engine oil maintenance: The replacement of engine oil and oil filter is mainly for the maintenance of the lubrication system. The main function of the lubrication system is to effectively lubricate various components of the car engine to prevent excessive wear. The oil filter functions to remove various impurities from the engine oil, ensuring the normal operation of the lubrication system. Brake maintenance: The car's brake system mainly consists of a vacuum booster pump, master cylinder, wheel cylinder, brake pads, and brake discs. Brake maintenance includes replacing brake fluid, brake pads, brake discs, etc. The brake pads and brake discs on the brake system are wear parts, and the brake fluid is a liquid that needs to be replaced regularly.

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What is the difference between 20W50 and 15W40?

15W40 and 20W50 are two different grades of engine oil with different low-temperature fluidity and high-temperature viscosity. The specific differences are as follows: Difference in low-temperature fluidity: The smaller the number, the better the low-temperature fluidity and cold-start performance. 15W40 has better low-temperature fluidity than 20W50 and can withstand lower temperatures. 15W40 can withstand temperatures as low as -20°C, while 20W50 can withstand temperatures as low as -15°C. Therefore, 15W40 offers better cold-start performance. Difference in high-temperature viscosity: The larger the number, the higher the viscosity and the better the high-temperature protection. 20W50 has higher high-temperature viscosity than 15W40, providing better cooling and lubrication at high temperatures, resulting in quieter engine operation. However, it has poorer fluidity and greater resistance, which also increases fuel consumption.

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What Causes Car Abnormal Noises?

Car abnormal noises mainly include engine abnormal noises, brake abnormal noises, and abnormal noises from other parts of the vehicle body. Engine abnormal noises: If there is abnormal noise from the belt, it is generally caused by belt slippage. If a hissing sound is heard, it is most likely due to blockage or breakage in the intake system or vacuum tube. Additionally, abnormal noises caused by friction of external metal accessories during engine operation may be due to damage to components such as the generator or water pump. Brake abnormal noises: The most common source is abnormal noises from the brake pads. A sharp friction sound during braking is mostly caused by foreign objects like sand in the brake disc or rust on the brake disc. Try pressing the brakes a few more times to eliminate the noise. Also, check if the brake pads are worn or have exceeded their service limit.

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Where is the Yancheng Yueda Kia Factory Located?

The Yancheng Yueda Kia Factory is located in Yancheng City, Jiangsu Province, by the Yellow Sea. It is one of the 520 key state-owned enterprises in China that has grown rapidly during the country's reform and opening-up. 1. After more than 30 years of hard work, it now has over 20 subsidiaries at home and abroad, nearly 40,000 employees, and total assets of 40 billion yuan. 2. It has industrial clusters in industrial manufacturing, energy and minerals, highway investment, modern agriculture, modern services, real estate development, and financial services, and has successfully established close cooperation with internationally renowned companies such as South Korea's Hyundai (a Fortune 500 company), France's Carrefour, Japan's Fuji Heavy Industries, and Germany's Triumph and Erwin Hymer Group.

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What is the detailed explanation of automotive engine oil grades?

What does driving illusion include?

What does it mean when the check light on the dashboard is on?

What are the regular maintenance items at a 4S shop?

What is the difference between 20W50 and 15W40?

What Causes Car Abnormal Noises?

Where is the Yancheng Yueda Kia Factory Located?

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