What is the difference between diesel engines and gasoline engines?

Is it okay to use 92-octane gasoline for the Jetta VS5?

Jetta VS5 can use 92-octane gasoline. This octane rating is recommended in the vehicle's official user manual. In addition to checking the appropriate gasoline octane rating in the user manual, the Jetta VS5 also indicates it on the fuel tank cap. You can usually determine the suitable gasoline grade based on the engine's compression ratio. Vehicles with an engine compression ratio between 8.6-9.9 should use 92-octane gasoline, those between 10.0-11.5 should use 95-octane, and higher compression ratios may require 98-octane. However, with the application of new technologies, the compression ratio alone cannot determine the required gasoline grade, as high-compression engines can also be tuned to use lower-octane fuel. Other factors, such as ignition timing, turbocharging technology, and Atkinson cycle technology, also play a role. Generally, the higher the gasoline octane rating, the higher the octane number and the better the anti-knock performance. 92-octane gasoline contains 92% isooctane and 8% n-heptane, while 95-octane gasoline contains 95% isooctane and 5% n-heptane. If you occasionally use the wrong gasoline octane rating in the Jetta VS5, simply switch back to the correct one after the current tank is used up. However, prolonged use of the wrong octane rating can have the following effects: For vehicles designed for lower-octane fuel, using higher-octane gasoline will not cause damage, but the increased octane number may alter the fuel's ignition point, leading to delayed combustion in the engine. This reduces the engine's power output and thermal efficiency, resulting in poorer performance. For vehicles designed for higher-octane fuel, using lower-octane gasoline can cause engine knocking. The significantly lower octane number reduces the fuel's ignition point, causing premature ignition during the compression stroke. If combustion occurs before the spark plug fires, resistance is generated during the upward stroke. This resistance makes the engine run very unstably. Mild knocking may only increase noise without obvious engine damage, but severe knocking indicates serious engine conditions, affecting not only driving stability but also causing abnormal wear to pistons and cylinders, and even cylinder scoring in extreme cases.

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What are the precautions for car air conditioning?

Car air conditioning precautions are: 1. Turn off AC during startup and rapid acceleration; 2. Avoid setting the air conditioning temperature too low; 3. When controlling the air vents, follow this principle: point vents upward when using cooling and downward when using heating; 4. Don't turn on air conditioning immediately after exposure to strong sunlight; 5. Turn off air conditioning before shutting down the engine. Car air conditioning refers to the air conditioning system installed in vehicles, which can cool, heat, ventilate and purify the air inside the compartment, providing passengers with a comfortable environment, reducing driver fatigue, and improving driving safety. The air conditioning system has become one of the indicators for measuring whether a car is fully equipped.

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How much engine oil should be added to a Golf?

Golf should add 4L of engine oil. Engine oil is a substance enhanced with additives in base oil, whose main functions are to reduce friction and wear of moving parts, remove sludge and paint in the engine, neutralize acids generated from fuel and lubricant oxidation, improve the sealing of piston rings, and cool the engine by carrying away heat from moving parts. Taking the 2021 Golf 200TSI DSG as an example, its body dimensions are 4296mm in length, 1788mm in width, and 1471mm in height, with a wheelbase of 2636mm. The front suspension type is MacPherson independent suspension, and the rear suspension type is torsion beam non-independent suspension.

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How to Replace the Cabin Air Filter in an Eighth-Generation Accord?

To replace the cabin air filter in an eighth-generation Accord, follow these steps: 1. Open the glove compartment cover on the passenger side; 2. Press the fixing clips of the cover and pull it outward with force; 3. After removing the rear cover, take out the entire glove compartment to expose the cabin air filter; 4. Pull out the old cabin air filter and replace it with a new one. Functions of the cabin air filter: 1. Provide fresh air; 2. Ensure safety and hygiene; 3. Absorb harmful substances; 4. Filter solid impurities. The cabin air filter should be replaced promptly as it harbors bacteria that can circulate into the vehicle, potentially causing respiratory diseases for occupants with prolonged use.

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What Should You Pay Attention to with Car Tires?

Car tires require attention to speed rating, load index, tread pattern, brand, and size, which are beneficial for safe driving. The functions of car tires are: 1. To mitigate impacts encountered during driving; 2. To ensure good comfort and smooth driving; 3. To guarantee excellent adhesion between the wheels and the road surface; 4. To enhance traction, braking, and off-road capability; 5. To bear the weight of the car. Methods for maintaining car tires include: 1. Regularly checking tire pressure; 2. Removing debris from the tread grooves; 3. Inspecting tire wear and replacing them promptly based on wear conditions; 4. Performing tire rotation, which ensures even force distribution across all four tires and prevents excessive wear.

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What is the function of active grille shutters?

Active grille shutters serve the purposes of cooling and air intake. When the engine radiator's water temperature is too high and natural airflow alone is insufficient for adequate cooling, the fan will automatically activate to assist in heat dissipation. As the car moves, air flows backward, and the fan's airflow direction is also backward. The heated airflow after cooling flows from the area near the windshield behind the engine hood and beneath the car, allowing the heat to be discharged. The automotive intake system primarily consists of a variable intake system, which mainly includes four types: variable valve timing, continuously variable valve timing, electronic variable timing, and electronic variable valve lift. The assembly of components that direct air or the air-fuel mixture into the engine cylinders is referred to as the engine intake system.

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What is the difference between diesel engines and gasoline engines?

Is it okay to use 92-octane gasoline for the Jetta VS5?

What are the precautions for car air conditioning?

How much engine oil should be added to a Golf?

How to Replace the Cabin Air Filter in an Eighth-Generation Accord?

What Should You Pay Attention to with Car Tires?

What is the function of active grille shutters?

Why can't the car door be opened from the outside after locking, but can be opened from the inside?

Are New Cars Fuel-Efficient or Fuel-Consuming?

How Long Does It Take for a New Car to Be Delivered from the Factory to the 4S Store?

How Many Years Can a Car Be Driven?