What is one of the requirements that shock absorbers must meet?

Should Volkswagen Golf Use 92 or 95 Octane Gasoline?

According to the official vehicle manual recommendation, Volkswagen Golf should use 92 octane gasoline. In addition to checking the suitable gasoline grade in the vehicle manual, Volkswagen Golf owners can also find this information on the fuel tank cap, which will be clearly marked. Generally, the gasoline grade can also be determined based on the engine's compression ratio. Vehicles with an engine compression ratio between 8.6-9.9 should use 92 octane gasoline, while those with a compression ratio between 10.0-11.5 should use 95 octane gasoline. However, with the application of new technologies, the compression ratio alone cannot determine the appropriate gasoline grade, as high compression ratio engines can also be tuned to use lower octane gasoline. This is because, besides the compression ratio, other factors such as ignition timing, turbocharging technology, and Atkinson cycle technology also play a role. Generally, the higher the gasoline grade, 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 Volkswagen Golf occasionally uses the wrong gasoline grade, simply switch back to the correct grade after the current tank is used up. However, long-term use of the wrong gasoline grade can have the following effects: For vehicles recommended to use lower octane gasoline, using higher octane gasoline will not cause damage, but the increase in octane number will change the fuel's ignition point, leading to delayed combustion in the engine. This means both the engine's power output and thermal efficiency will decrease, resulting in poorer performance. For vehicles recommended to use higher octane gasoline, using lower octane gasoline can cause engine knocking. Because the octane number is too low, the gasoline will ignite prematurely during the compression stroke. If combustion occurs before the spark plug fires, resistance will arise during the upward stroke. This resistance will make the engine run very unstably. If the knocking is mild, it may only increase noise without significant damage to the engine. However, if the knocking is severe, it indicates serious engine conditions, affecting not only driving stability but also causing abnormal wear on pistons and cylinders, and in severe cases, cylinder scoring.

4

2

Share

Where is the Bora engine number located?

The Bora engine number is located on the front side wall of the engine block, below the front windshield near the wiper. There is a small horizontal strip, and the engine number is found below the barcode on this strip. The engine model is an identification code assigned by the engine manufacturer in accordance with relevant regulations, industry or corporate practices, and the attributes of the engine. It is used to indicate information such as the manufacturer, specifications, performance, features, technology, purpose, and production batch of the engine, including fuel type, number of cylinders, displacement, and static brake power. The engine model is an identification code assigned by the engine manufacturer in accordance with relevant regulations, industry or corporate practices, and the attributes of the engine. It is used to indicate information such as the manufacturer, specifications, performance, features, technology, purpose, and production batch of the engine, including fuel type, number of cylinders, displacement, and static brake power. Engines installed in passenger cars or multi-purpose vehicles are required to display the professional manufacturer, model, and production number of the engine. It is important to note that the engine number is not the same as the engine model. The engine model refers to the specifications and size of the engine within the manufacturer's product line, and multiple engines can share the same model. The engine number, however, refers to the production serial number of the engine. Each engine has a unique number, and no two engines share the same engine number. Composition of the vehicle engine number: Front section: Includes product series code, generation symbol, and regional or corporate code. Manufacturers may choose appropriate letters as needed, but these must be approved and recorded by the industry standardization unit. Middle section: Consists of symbols for the number of cylinders, cylinder arrangement, stroke, and cylinder diameter. Rear section: Composed of symbols for structural features and usage characteristics. Tail section: Distinguishing symbol. When differentiation is needed due to improvements or other reasons within the same product series, manufacturers may select appropriate symbols. The rear and tail sections can be separated by a hyphen (-).

5

1

Share

Why is the engine warning light on in the new Mondeo?

There are mainly 7 reasons why the Mondeo engine warning light is on: Sensor malfunction: The sensors mentioned here include coolant temperature, crankshaft position, air flow, intake temperature, oxygen sensors, etc. When these sensors are damaged, have poor contact, or signal interruption, the car's ECU cannot accurately obtain engine data, which will trigger the engine warning light. Fuel quality issues: If fuel and engine oil are not added as required by the manufacturer, it may cause engine wear and trigger the warning light. Poor combustion of air-fuel mixture: Poor combustion can lead to engine carbon deposits or knocking. When detected by the oxygen sensor and reported to the ECU, the warning light will illuminate as a warning. Spark plug failure, ignition coil failure, fuel pump failure, and fuel line blockage can all cause poor combustion of the air-fuel mixture. Turbocharging issues: The intake turbocharging pipeline and turbocharger can also cause the engine warning light to come on. The most common is turbocharger damage, accompanied by symptoms such as oil leakage, high oil consumption, reduced power, metal noises, and blue or black smoke from the exhaust pipe. Intake issues: If there is a problem with the car's intake, it may cause engine pipeline blockage, and in severe cases, trigger the engine warning light. A dirty air filter that is not cleaned regularly can lead to intake problems. Exhaust issues: Exhaust faults can also cause the engine warning light to come on. The rear oxygen sensor, catalytic converter, exhaust camshaft, and bearing failures are all causes of exhaust problems, with the catalytic converter being the most common. Using leaded gasoline, lead or silicon-containing lubricant additives, physical damage to the catalytic converter, and fuel system failures can easily cause catalytic converter problems. Anti-theft system malfunction: If the car's electronic anti-theft system malfunctions, or if the anti-theft controller does not match the engine electronic controller, the anti-theft system can also prevent the engine from operating normally, and the engine warning light will illuminate. If the engine warning light is on, follow these steps: First, check if the engine is running normally, whether there is shaking, black smoke, etc. If so, try not to start the engine again. Especially note that if the red light is on, do not start the engine. If the engine can be started, turn it off for 5-10 minutes, then without pressing the brake, press the start button once, or without pressing the clutch, turn the key halfway to the 'on' position. The car will perform a self-check after powering on. Wait for 5-10 seconds and observe whether the warning light on the dashboard goes off. If the warning light does not go off, visit a service station as soon as possible to find the cause. The service station can use a portable diagnostic tool to read the fault codes, obtain fault information, and perform targeted repairs.

5

Share

How to Choose the Front Windshield for a Car?

Methods for selecting a car's front windshield: Currently, there are mainly three types of front windshields for cars—laminated glass, tempered glass, and zoned tempered glass. If budget permits, it is recommended to consider laminated zoned tempered glass, as it maintains a certain level of clarity when impacted and cracked, ensuring the driver's field of vision remains unaffected. Laminated glass refers to a type of transparent adhesive plastic film sandwiched between two or three layers of glass, combining the toughness of plastic with the hardness of glass, thereby enhancing the glass's resistance to shattering. Tempered glass is made by quenching ordinary glass to create internal stresses, thereby strengthening the glass.

6

0

Share

Are 9-Seater Vehicles Issued Blue or Yellow License Plates?

9-seater commercial vehicles are issued blue license plates. Blue license plates refer to vehicles with blue-colored plates, typically featuring white characters and white borders on a blue background. The specific details about license plates are as follows: 1. Small vehicle license plates: Blue background with white characters and white borders. This type of plate is issued to small trucks with a total weight below 4,500KG (excluding) and small private vehicles with a passenger capacity (excluding the driver) of fewer than 20 people and a body length under 6 meters (excluding). 2. Large civilian vehicles: License plates with a yellow background and black characters. 3. Small civilian vehicles: License plates with a blue background and white characters.

15

0

Share

How to Open the Fuel Cap of a Volkswagen Lavida?

The method to open the fuel cap of a Volkswagen Lavida is: press the fuel cap after unlocking to open it. The fuel cap refers to the box on the car used to store gasoline. Taking the 2021 Volkswagen Lavida Luxury Edition as an example, it belongs to the compact car category, with body dimensions of: length 4670mm, width 1806mm, height 1474mm, and a wheelbase of 2688mm. The 2021 Volkswagen Lavida Luxury Edition is equipped with a 1.4L turbocharged engine, with a maximum power of 110kW and a maximum torque of 250Nm, paired with a 6-speed automatic transmission. The front suspension uses a MacPherson independent suspension, and the rear suspension uses a torsion beam non-independent suspension.

5

4

Share

What is one of the requirements that shock absorbers must meet?

Should Volkswagen Golf Use 92 or 95 Octane Gasoline?

Where is the Bora engine number located?

Why is the engine warning light on in the new Mondeo?

How to Choose the Front Windshield for a Car?

Are 9-Seater Vehicles Issued Blue or Yellow License Plates?

How to Open the Fuel Cap of a Volkswagen Lavida?

Is the Subaru CVT using a steel belt or chain drive?

What is the purpose of a car stabilizer bar?

Is it mandatory to use 95 octane gasoline for the Volkswagen Tiguan L?

What are the symptoms of a broken clutch in a car?