What does the 'H' on car tires mean?

What is the difference between Mobil Super 5w30 and 5w40?

The differences between Mobil Super 5w30 and 5w40 are: 1. Different high-temperature viscosity: 5w30 has lower high-temperature viscosity, better fluidity, and faster engine heat dissipation; 5w40 has higher high-temperature viscosity, poorer fluidity, but less fluctuation and greater stability. 2. Different applicable objects: 5w30 can effectively reduce fuel consumption and has lower noise, making it suitable for new cars or naturally aspirated engines; 5w40 has higher viscosity and is more suitable for older cars. The number after 'W' in the oil model indicates the kinematic viscosity of the engine oil at 100 degrees Celsius. The larger the number, the higher the viscosity, meaning better and more stable protection at high temperatures, with a lower possibility of thinning at high temperatures.

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What Causes Intermittent Operation of Car Air Conditioning?

Car air conditioning may work intermittently due to issues with the radiator, compressor malfunctions, or insufficient refrigerant. Below is relevant information about car air conditioning compressors: 1. Overview: The car air conditioning compressor is the heart of the refrigeration system, responsible for compressing and circulating refrigerant vapor. Compressors are categorized into fixed displacement and variable displacement types. Based on working principles, they can also be classified as fixed displacement compressors and variable displacement compressors. 2. Common Faults: Typical issues include abnormal noises, leaks, and failure to operate. Various factors can cause compressor noise, such as damaged electromagnetic clutches or severe internal wear within the compressor.

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How Many Years Can a New Car Be Driven?

Generally speaking, 15 years is a threshold. The current traffic laws have introduced new regulations regarding the service life of vehicles. For non-commercial vehicles that have been in use for more than 15 years, owners are required to undergo an annual inspection at the vehicle management office every six months. There are also regulations on mileage, stipulating that if a car's mileage reaches 600,000 kilometers, it must be forcibly scrapped. New scrapping standards: 1. Non-commercial passenger vehicles: Non-commercial passenger vehicles with 9 seats or fewer (including 9 seats, such as sedans and off-road vehicles) have a service life of 15 years. If the vehicle is required to continue in use after reaching the scrapping standard, approval is needed. After passing inspection, the service life can be extended, with two annual inspections required each year. For vehicles over 20 years old, four annual inspections are required from the 21st year onwards. 2. Tourist passenger vehicles: Tourist passenger vehicles have a service life of 10 years. If continued use is required after reaching the scrapping standard, the current procedures must be followed, but the service life can be extended for a maximum of 10 years. Tourist passenger vehicles with extended service life require four annual inspections each year. 3. Commercial buses: The service life of commercial buses has been adjusted to 10 years. If continued use is required after reaching the scrapping standard, the current procedures must be followed. The extended service life cannot exceed 4 years, with four annual inspections required each year during the extended period.

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Can the Buick GL8 still be driven when the oil life reaches 0?

Yes, but it is not recommended to continue driving. When the oil life shows 0, it is best to check whether it is caused by data errors such as not resetting after changing the oil or the oil not being used for a long time. Engine oil has a certain service life, and it is not recommended to drive when the oil life reaches 0. The vehicle computer only prompts the oil life based on the set mileage, which can be used as a reference. The vehicle computer only prompts the oil life based on the set mileage, which can be used as a reference. The following is an introduction to oil life: 1. Oil shelf life: Engine oil has a shelf life and cannot be used indefinitely. The shelf life of engine oil varies depending on its state. If the oil is unopened, its shelf life can be as long as five years; if it is the remaining oil after car maintenance, because it has been opened, the shelf life will be shortened, approximately one year; if it is the oil already poured into the engine for use, the shelf life is the shortest, about six months. 2. Whether the oil has deteriorated: While checking the car's oil, you can use an oil detection filter paper to test whether the oil has deteriorated. By dripping the oil onto the filter paper, three important ring-shaped areas can be obtained: the deposit ring, the diffusion ring, and the outer oil ring, which can sequentially indicate the degree of oil contamination, the dispersing ability of additives in the oil to contaminants, and the degree of oil oxidation.

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Is It Safe to Sleep in a Car with the Air Conditioning On in Summer?

Sleeping in a car with the air conditioning on in summer is not safe. According to experimental data, in a closed car, running the air conditioning produces a large amount of carbon monoxide. In just over 20 minutes, the carbon monoxide concentration can exceed safe levels significantly, causing a noticeable sense of suffocation. Regardless of the type of car or whether the air circulation is set to internal or external, carbon monoxide can still enter the cabin. Precautions for using air conditioning: 1. Use external circulation after sun exposure: If the car has been exposed to the sun outdoors, first turn on the external circulation to ventilate and dissipate heat. Additionally, opening the windows and sunroof can speed up heat dissipation. After 3-5 minutes, when the interior temperature has stabilized, close the windows, turn on the cooling, and switch the air circulation to internal. 2. Use internal circulation in cold weather: In cold weather, wait a moment after getting in the car until the engine reaches normal operating temperature. Then, turning on the heater with internal circulation can quickly raise the temperature. 3. Use external circulation on highways: During high-speed driving, you can turn on the external circulation as needed. Prolonged use of internal circulation during long drives can lead to stale air inside the car, so switching to external circulation helps maintain a comfortable temperature while bringing in fresh air. However, if the air conditioning was initially turned on to cool the car, avoid keeping the external circulation on continuously. Instead, periodically switch to external circulation to refresh the air.

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What is the average fuel consumption of the old Excelle?

The average fuel consumption of the old Excelle is 9.0. Here are the pros and cons of the Excelle car: 1. Pros: Good sound insulation, very sensitive steering wheel, strong engine power during high-speed driving, and stable acceleration. The exterior is very stylish, and the paintwork is also attractive. The interior resembles that of a mid-range car, not complicated and very practical. The sound system of this car is also of good quality, and the air conditioning works well. 2. Cons: The engine noise is relatively loud. The pedals are too high, which can cause fatigue for the driver after long periods of driving. The gear shift is not very comfortable to use, and the horn button is small and hard. The passenger side window glass often does not rise fully.

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What does the 'H' on car tires mean?

What is the difference between Mobil Super 5w30 and 5w40?

What Causes Intermittent Operation of Car Air Conditioning?

How Many Years Can a New Car Be Driven?

Can the Buick GL8 still be driven when the oil life reaches 0?

Is It Safe to Sleep in a Car with the Air Conditioning On in Summer?

What is the average fuel consumption of the old Excelle?

How to Solve the Problem of Car Parking Lights Not Working?

What Causes the Thumping Sound in the Front Wheels of a BMW 5 Series?

Is it necessary to reset the average fuel consumption?

What are the reasons for the Mercedes-Benz C-Class center console screen not lighting up?