When to Perform Wheel Alignment?

Does Engine Oil Have a Shelf Life?

Engine oil does have a shelf life. Unopened engine oil typically lasts 3-5 years, while opened engine oil has a shelf life of about 6 months. The following are the functions of engine oil: 1. Cleaning: The cleaning process is achieved through the circulation of oil within the engine; 2. Sealing: Oil forms a film in the gaps between components, which acts as a seal to ensure the tightness of the cylinders; 3. Cooling: During engine operation, a large amount of heat is generated. Most of this heat is dissipated through the engine's cooling system, while some is absorbed by the oil from surfaces like the cylinders and pistons, then carried to the oil pan for dissipation; 4. Anti-rust: Engine oil contains multi-functional additives like rust inhibitors, which form a dense, well-arranged protective layer on metal surfaces, effectively preventing the intrusion of corrosive substances. 5. Cushioning: During engine startup, acceleration, or significant load changes, components such as piston pins, connecting rod ends, and crankshaft bearings experience intense vibrations. Oil with appropriate viscosity can absorb some of the impact energy, providing a cushioning effect.

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Can a 400cc Motorcycle Be Licensed?

Motorcycles are classified as motor vehicles and must be licensed. Below are the relevant regulations: 1. Article 13: Motor vehicle license plates must be displayed at designated positions on the front and rear of the vehicle, kept clear and intact. Heavy and medium-duty trucks and their trailers, as well as tractors and their trailers, must have enlarged license plate numbers painted on the rear of the body or carriage, with characters upright and clearly visible. The motor vehicle inspection compliance mark and insurance mark must be affixed to the upper right corner of the front window. Any painting, labeling, or body advertising on the motor vehicle must not affect safe driving. 2. Article 39: When driving at night under good street lighting or in poor visibility due to dim weather, motor vehicles must turn on anti-glare low beams, width indicators, and taillights; when driving at night without street lighting or with poor street lighting, low beams must be switched to high beams, but following vehicles in the same direction must not use high beams; fog lights must be turned on in foggy weather.

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When will China VI emission standards be implemented?

China VI standards are divided into two phases, a and b. Starting from July 1, 2019 at the earliest, all light-duty vehicles sold and registered must comply with China VIa requirements; by July 1, 2023 at the latest, all light-duty vehicles sold and registered must meet China VIb limit requirements. This means that China VIa can only be considered a transitional phase, while China VIb represents the true China VI stage. More relevant information is as follows: 1. Currently, some regions have implemented China VI emission standards ahead of schedule. For example, Guangzhou implemented China VI emission standards for light-duty gasoline and diesel vehicles starting from March 1, 2019; Shenzhen required light-duty diesel vehicles to comply with China VI standards from July 1, 2018, and light-duty gasoline vehicles to meet China VI standards from July 1, 2019. 2. After the announcement of China VI standards, their extremely strict limit values earned them the title of "the most stringent standards in history." Compared to the current China V standards, China VI standards reduce carbon monoxide emissions by 50%, total hydrocarbon and non-methane hydrocarbon emission limits by 50%, and nitrogen oxide emissions by 42%. All indicators not only fully meet the current EU standards but even exceed them in some cases.

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What Causes Car Tail Lights to Stay On?

Car tail lights staying on is due to a short circuit in the brake light switch, which requires replacement. If the issue is not with the brake light switch, it may be a fault in the car's electrical system. Owners should not attempt to fix this themselves and should instead seek professional help at a 4S store or a specialized repair shop. Brake lights are typically installed at the rear of the vehicle to enhance the penetration of the light source, making it easier for following vehicles to detect braking even in low visibility conditions, thereby helping to prevent rear-end collisions. Brake lights illuminate when the vehicle brakes and are usually red, effectively preventing rear-end collisions and reducing traffic accidents. They are bright and highly visible, primarily serving to alert following vehicles. Incorrect use or malfunction of brake lights can easily lead to rear-end collisions. Additionally, when replacing brake light bulbs, note that vehicle tail lights often serve dual purposes—each bulb contains two filaments: a weaker one for the parking light and a stronger one for the brake light. Some manufacturers design these as high-low pin plug-ins for convenience, but care must be taken during replacement to avoid incorrect installation.

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What is a Keyless Start System?

A keyless start system (Keyless-Start-System) allows the vehicle to be started without physically using the key. Simply keep the key in your bag or pocket, then press a button inside the car or turn the ignition knob to start the engine. This system utilizes advanced Radio Frequency Identification (RFID) technology, automatically unlocking and locking doors via the chip embedded in the smart key. Below are details about the keyless start system's functions: 1. Locking/Unlocking Doors: When the key is within the effective detection range of about 1.5 meters from the driver's door, the key chip's ID automatically matches the engine's ID. Upon successful pairing, the car doors unlock without requiring the key. When the driver leaves the vehicle, the doors automatically lock and activate the anti-theft system. If the smart key's battery is depleted, the door handle features a touch-sensitive button and a traditional keyhole as a backup. 2. Starting/Stopping the Vehicle: Upon entering the car, the onboard detection system recognizes the smart key. After verification, the vehicle's computer activates, allowing the engine to start by pressing the one-touch start button (or turning the knob). To stop the engine, simply press the start button (or knob) again after the vehicle comes to a complete halt.

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Is Fender Soundproofing Effective?

Fender soundproofing has minimal effect, but fender liner soundproofing is effective. Below the fender, above the wheel, there is a black plastic piece called the fender liner. This component prevents mud, water, or stones kicked up by the tires from entering the engine compartment. Many high-end luxury cars have some soundproofing design in their fender liners. When driving, most of the noise comes from wind and tire noise. If the car has a high drag coefficient, wind noise will be more noticeable at high speeds. To reduce noise, you can also install door soundproofing foam, which can block most of the noise.

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When to Perform Wheel Alignment?

Does Engine Oil Have a Shelf Life?

Can a 400cc Motorcycle Be Licensed?

When will China VI emission standards be implemented?

What Causes Car Tail Lights to Stay On?

What is a Keyless Start System?

Is Fender Soundproofing Effective?

What are the differences between Audi A4 and Audi A5?

How to start a Honda CR-V?

What does 98W on a tire represent?

What is the correct method for one-button start in a manual transmission car?