What causes the hissing sound when the car AC is turned on?

Should the Volkswagen Lavida use 92 or 95 octane fuel?

Lavida's factory-recommended fuel grade is 92 octane. It is advisable to follow the manufacturer's requirements. Generally, 92 octane gasoline is suitable for gasoline-powered vehicles with an engine compression ratio between 8.6-9.9, while 95 octane gasoline is suitable for those with a compression ratio between 10.0-11.5. Key energy-saving indicator: The primary criterion for selecting gasoline grade is the engine's compression ratio, which is also the core energy-saving indicator in modern vehicles. Impact of compression ratio: The higher the compression ratio of an engine, the smaller the volume of combustible mixture is compressed, resulting in greater power and lower fuel consumption. Engines with higher compression ratios require gasoline with higher anti-knock properties, meaning a higher octane rating.

16

1

Share

How often should the Honda NS125D from Sundiro Honda be serviced?

The Honda NS125D from Sundiro Honda should be serviced every 2,000 kilometers. Motorcycle maintenance methods: Regularly change the engine oil. The manufacturer's manual for new motorcycles specifies oil changes at 300, 500, and 1,000 kilometers, depending on the quality of the oil used. Replace the motorcycle filter element generally every 3,000 kilometers. In urban areas with cleaner streets, it can be replaced every 5,000 kilometers, while in rural areas, it's typically more frequent. Regularly charge the motorcycle battery, about once a year, especially for water-based batteries, which may require adding distilled water after approximately one year. Motorcycle maintenance items: Routine maintenance for motorcycles is quite simple, primarily revolving around lubricant replacement. The replacement interval should consider both the time since the last change and the frequency of use. Fuel system: During normal use, regularly clean the air filter, carburetor, and fuel injector. The air filter should be cleaned more frequently—once every two oil changes (excluding the break-in period). The carburetor can be cleaned every 5,000 kilometers, and the fuel injector about every 10,000 kilometers. Running gear: Regularly check tire pressure and chain tension. Typically, adjust the chain every 1,000 kilometers (depending on chain quality), and check tire pressure monthly. Control system: Regularly inspect clutch free play, brake free play, steering flexibility, electrical switch sensitivity, and lighting effectiveness. These items can generally be checked every three months. Battery: The motorcycle battery undergoes charging and discharging cycles. Even under normal use, check the tightness of the mounting bolts and the electrolyte level. These two items should be inspected every three months. Cleaning and bolts: Cleaning the exterior and tightening bolts are also part of maintenance. While washing a motorcycle seems straightforward, avoid spraying water directly onto the handlebars, switches, dashboard, and electrical components to prevent water ingress and potential electrical leakage.

7

1

Share

Are Cars Afraid of Getting Wet in the Rain?

Cars are not afraid of getting wet in the rain. The only part that might get damaged by rain is the car's paint. Although current environmental pollution is quite severe, and rainwater contains some acidic substances that can cause certain damage to the car's paint, this damage is negligible. Rainwater Testing: Before leaving the factory, cars undergo similar rainwater testing to prevent the paint from being corroded by water. Heavily Polluted Areas: In some heavily polluted areas, the air contains a lot of sulfur dioxide, nitrogen oxides, and dust particles. These rise into the clouds and condense into acid rain, which falls on the car body. Prolonged exposure to rain without timely cleaning can corrode the car's paint. Car paint corroded by acid rain will age, lose its luster, or even crack. Therefore, it's advisable to rinse the car body after rain. If the car is parked outdoors, you can buy a car cover to protect it from rain, dust, and sunlight, effectively safeguarding the car.

15

3

Share

What does SP/GF-6 mean for engine oil?

GF-X grade is an engine oil quality certification standard established by the International Lubricant Standardization and Approval Committee. This standard places greater emphasis on fuel economy, hence generally requiring lower viscosity. The number following GF is generally considered to correspond to national emission standards, with GF-6 commonly referred to as China VI. Function of engine oil: The engine is an indispensable part of a vehicle, and engine oil is an essential component for the engine, highlighting its crucial role in automobiles. Timely replacement of engine oil: Regarding engine oil requirements, each vehicle model has its own compatible oil specifications, which can be found in the car's user manual. If the engine oil has been used for an extended period, it is imperative for the owner to replace it promptly. Prolonged use causes the oil's viscosity to decrease, leading to a corresponding reduction in lubrication effectiveness. This diminishes the oil's ability to lubricate and protect the engine, underscoring the importance of timely replacement.

15

4

Share

Can Idling at 3500 RPM Clean Carbon Deposits?

Idling at 3500 RPM can clean carbon deposits. However, it is not recommended to clean carbon deposits by idling for extended periods. Idling is harmful to the engine: Especially when the RPM exceeds 4000, if the car is not moving and there is no airflow to cool the engine, it can negatively impact the engine. Cleaning carbon deposits: Cleaning carbon deposits is a relatively lengthy process. Maintaining medium to high RPM operation allows the engine to intake more air with smoother airflow, which can help clean carbon deposits. However, when carbon buildup is severe, it may not be completely removed. This method is more suitable for regular driving to prevent severe carbon buildup in the engine. Therefore, cars should not always operate at low speeds.

8

2

Share

Vulnerabilities in Residential License Plate Recognition Systems?

Vulnerabilities in residential license plate recognition systems are as follows: 1. Slow driving: All experienced drivers know to drive slowly when approaching an intelligent barrier gate. The so-called slow driving means driving slightly slower than normal speed, because current intelligent license plate recognition systems cannot capture license plates of high-speed vehicles like "heavenly eyes" can. 2. Induction loop: Those familiar with products in this industry know that a license plate recognition system consists of a recognition system, camera, intelligent barrier gate, and induction loop. The camera only begins detecting license plates when vehicles reach the position of the induction loop. Therefore, experienced drivers know where the induction loop is located and will slow down when reaching it. 3. Checking license plates: Experienced drivers know that license plates are the "ID cards" of vehicles, and the recognition system can only detect this "ID card." If the license plate cannot be detected, the intelligent barrier gate will not open. The most common occurrences are dirty, damaged, or obscured license plates. Checking license plates is something easily overlooked by vehicle owners. Only when waiting for a long time in front of the residential gate camera without the barrier gate opening will they get out to check.

1

Share

What causes the hissing sound when the car AC is turned on?

Should the Volkswagen Lavida use 92 or 95 octane fuel?

How often should the Honda NS125D from Sundiro Honda be serviced?

Are Cars Afraid of Getting Wet in the Rain?

What does SP/GF-6 mean for engine oil?

Can Idling at 3500 RPM Clean Carbon Deposits?

Vulnerabilities in Residential License Plate Recognition Systems?

What is the speed limit for large buses on highways?

Why does a newly replaced car battery run out of power again?

Is it necessary for small cars to be equipped with fire extinguishers?

Will changing drivers in the emergency lane result in penalty points?