Is it necessary to visit the test site in advance for Subject 2?

What happens if a car designed for 95-octane gasoline is filled with 92-octane?

If a car is occasionally filled with 92-octane gasoline, there won't be significant impact. However, prolonged use of 92-octane gasoline can cause certain damage to the car's engine, and in severe cases, may even lead to engine failure. The reason cars specify fuel grades is due to differences in engine performance. Vehicles using higher-octane gasoline generally have better engine anti-knock performance. If an engine is designed for 95-octane fuel, it must be filled with 95-octane gasoline. Long-term use of gasoline with different octane ratings can affect the car's ignition system, fuel injectors, and the lifespan of spark plugs. The chemical compositions of these two fuel grades are relatively similar, but 95-octane gasoline has higher fuel efficiency and provides more sufficient power for the vehicle. Generally, naturally aspirated cars use 92-octane fuel, while turbocharged vehicles use 95-octane.

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What is the maximum speed allowed on an 80 km/h speed-limited highway?

On highways with an 80 km/h speed limit, the maximum speed can reach up to 88 km/h. Penalty measures for different speed ranges: If you exceed the speed limit but not by more than 10%, you will not be fined or receive penalty points, but you may receive a warning; if you exceed the speed limit by more than 10% but less than 20%, you will be fined and receive 3 penalty points; if you exceed the speed limit by more than 20% but less than 50%, you will be fined and receive 6 penalty points; if you exceed the speed limit by more than 50% but less than 70%, you will be fined and receive 12 penalty points, and your driver's license may be revoked; if you exceed the speed limit by more than 70%, you will be fined and receive 12 penalty points, and your driver's license may be revoked. Legal basis: Article 86 of the Road Traffic Safety Law of the People's Republic of China.

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Can the Car Windshield Washer Reservoir Freeze and Get Damaged?

Car windshield washer reservoirs can freeze and get damaged. Therefore, during winter, it is important to use antifreeze windshield washer fluid to avoid freezing. If the washer fluid freezes, avoid frequently using the spray function, as continuous use may burn out the wiper motor. The first step should be to thaw the washer fluid. Correct methods for thawing windshield washer fluid: 1. If the washer fluid is not severely frozen, start the vehicle and allow the engine's temperature to gradually thaw it; 2. If the engine temperature is insufficient to melt the washer fluid, you can pour some lukewarm water into the reservoir to aid melting—never use hot water, as this could crack the reservoir; 3. If the washer fluid has frozen to the point of expanding and cracking the reservoir, seek professional assistance at a repair shop. 4. After thawing the washer fluid, promptly replace it with antifreeze windshield washer fluid suitable for your vehicle to prevent freezing again.

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Can You Change Only the Oil Filter Without Changing the Oil?

It is not advisable to change only the oil filter without changing the oil in a car. Below is a detailed introduction to the oil filter: 1. Introduction: The oil filter, short for oil cleaner, removes impurities such as dust, metal particles, carbon deposits, and soot particles from the oil. It supplies clean oil to moving parts like the crankshaft, connecting rod, camshaft, turbocharger, and piston rings, providing lubrication, cooling, and cleaning functions, thereby extending the lifespan of these components. 2. Efficiency: After being used for a period, the oil filter accumulates a lot of sludge and metal debris on its filter element, which reduces its filtering efficiency. The oil pressure passing through the filter also decreases significantly. 3. Working Principle: When the oil pressure drops to a certain level, the bypass valve of the oil filter opens, allowing unfiltered oil to enter the oil circuit through the bypass. The impurities carried can increase wear on mechanical parts and, in severe cases, may block the oil passages, leading to mechanical failures.

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What is the lifespan of a carbon canister purge valve?

The lifespan of an automotive activated carbon canister is approximately 4 years or 60,000 kilometers. The carbon canister is prone to clogging, which can prevent fuel vapors from being properly vented, leading to excessive pressure buildup in the fuel tank. Its primary functions are to reduce emissions pollution and improve fuel efficiency. Below are some key details about activated carbon canisters: 1. The carbon canister is installed between the fuel tank and the engine. Since gasoline is a highly volatile liquid, the fuel tank often contains vapors at normal temperatures. The fuel evaporation emission control system is designed to direct these vapors into the combustion process and prevent them from being released into the atmosphere. The activated carbon canister storage device plays a crucial role in this process. 2. When the engine is turned off, gasoline vapors mix with fresh air inside the canister and are stored there. Upon engine startup, the electromagnetic valve of the fuel vapor purge device, located between the activated carbon canister and the intake manifold, opens. This allows the gasoline vapors stored in the activated carbon canister to be drawn into the intake manifold and participate in the combustion process.

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What to Do When the Seat Belt Won't Pull Out?

If the seat belt won't pull out, you can try the following methods to restore it: 1. Adjust the height of the height adjuster to provide extra retraction for the seat belt, thereby restoring its retracting performance. 2. Straighten the seat belt and gently pull it back and forth at the entry and exit points. Once the seat belt retracts smoothly, you can slowly pull it out. 3. If the above two methods don't work, it's likely that there is a mechanical issue where the seat belt connects inside the car. In this case, you need to take it to a 4S shop for disassembly, inspection, and repair. Often, the seat belt won't pull out because it was pulled out too quickly during use. The retractor in the seat belt structure has a locking function. Once subjected to a strong impact, the seat belt's pawl will lock the gear, securing the person in the seat. Therefore, when the seat belt won't pull out, avoid pulling it forcefully, as this will only make it tighter.

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Is it necessary to visit the test site in advance for Subject 2?

What happens if a car designed for 95-octane gasoline is filled with 92-octane?

What is the maximum speed allowed on an 80 km/h speed-limited highway?

Can the Car Windshield Washer Reservoir Freeze and Get Damaged?

Can You Change Only the Oil Filter Without Changing the Oil?

What is the lifespan of a carbon canister purge valve?

What to Do When the Seat Belt Won't Pull Out?

Can a nail puncture on the sidewall of a tire be repaired?

Can the Rear Seats of a Porsche 911 Accommodate Passengers?

Has the Porsche 911 been discontinued?

What documents are required for exemption from inspection?