What Causes the Noise from an Aftermarket BMW Valve Cover?

Can turbocharged cars use semi-synthetic oil?

Turbocharged cars can use semi-synthetic oil, but its service life, lubrication and cleaning effects, as well as its ability to resist high-temperature oxidation, are not as good as those of fully synthetic oil. Replacement cycle of semi-synthetic oil: In most Chinese cities, semi-synthetic oil can be replaced every 7,500 kilometers or 9 months. If there is too much dust in the air, the temperature is very low (-20 degrees Celsius), or the car is driven for short distances for a long time (each trip is less than 8 kilometers), it is recommended to increase the oil change frequency to 5,000 kilometers or half a year. Shelf life of semi-synthetic oil: The state clearly stipulates that the shelf life of sealed oil is basically within 5 years, and the shelf life of semi-synthetic oil is also within this range. However, semi-synthetic oil that has been opened will deteriorate faster, so it is best to use it within half a year. Of course, how long semi-synthetic oil takes to deteriorate also depends on the storage environment. The greater the temperature difference and humidity, the faster the oil deteriorates.

14

5

Share

Which is better, 94V or 94W tires?

Speed rating V indicates that the tire's maximum speed is 240 km/h, while speed rating W represents a maximum speed of 270 km/h. This means that the W rating is higher than V, indicating that W performance is superior to V. Therefore, the 94W tire is better than the 94V. Below is relevant information about tires: 1. Main materials of tires: The primary material of tires is rubber. The characteristic of rubber is that it ages after prolonged use or storage, leading to significant changes in the tire's physical properties such as hardness and wear resistance. Continued use of aged tires can lightly affect vehicle performance or, in severe cases, may cause a blowout. 2. Tire lifespan: Generally, all-season or economy tires have a lifespan of 3-5 years, with a mileage of around 50,000 kilometers. Under normal conditions, tires have a sufficient lifespan of 1 year from the date of manufacture. However, for high-performance tires, the lifespan is only 20,000-30,000 kilometers. If the price is reduced, purchasing them may also be considered.

13

1

Share

Which Dotted Line to Align with When Straightening the Car for Reverse Parking?

In the reverse parking test, there are 3 dotted lines at the garage entrance which can be used to determine the parking timing. During the process of straightening and reversing the vehicle into the parking space, observe when the lower edge of the left rearview mirror aligns with the dotted line at the garage entrance, then press the brake and clutch to stop. The timing for steering when exiting the garage can also utilize these dotted lines - when the rear wheel is about to reach the garage entrance dotted line, you can fully steer left or right to leave the test area. Below are relevant details about Subject 2: 1. Introduction: Subject 2 refers to the field driving skills test. For C1/C2 license tests, it includes five mandatory items: reverse parking, parallel parking, hill start, right-angle turn, and S-curve driving (some regions have a sixth item - highway toll card collection). 2. Content: Requires mastering basic vehicle control skills, becoming proficient in fundamental field and road driving methods, acquiring the ability to properly use vehicle controls and accurately position the vehicle in space, and demonstrating precise control over the vehicle's position, speed and trajectory.

16

5

Share

What is the maximum horsepower of domestic tractors?

The maximum horsepower of domestic tractors is 600. The development of this vehicle is entirely targeted at the domestic heavy haulage market rather than the ordinary road transport market. The engine equipped in this vehicle: The heart of this 600-horsepower heavy-duty tractor will be an imported Cummins ISX series engine, which is considered a flagship power unit in its home market of North America and is installed in many American heavy trucks. This inline 6-cylinder engine has a displacement of 15 liters, with a maximum output of 600 horsepower and peak torque reaching 2,237 N·m. Horsepower of domestic tractors: Currently, heavy haulage vehicles above 500 horsepower in China are almost entirely dominated by imported vehicles, while the vast majority of domestic high-horsepower tractors are concentrated in the 400 horsepower range.

19

0

Share

What does 240 at the back of a CRV mean?

240 at the back of a CRV refers to the turbocharged engine model, which can reflect the vehicle type. The CRV is a specific type of vehicle. Below is detailed information about vehicle types: 1. Overview: Vehicle type refers to a specific form of vehicle, distinguished by common characteristics, intended use, and functionality. Examples include sedans, trucks, buses, trailers, and incomplete vehicles, each being a separate type. 2. Others: Heavy-duty vehicles have a length of 6m or more and a total mass of 12,000kg or more. Medium-duty vehicles have a length of 6m or more and a total mass between 4,500kg and 12,000kg. Light-duty vehicles have a length of less than 6m and a total mass of less than 4,500kg. Mini vehicles have a length of 3.5m or less and a load capacity of 1,800kg or less.

16

3

Share

Why Do Water Droplets Not Fall Off After Car Waxing?

It is a normal phenomenon for water droplets to not flow off the car after waxing. Here is the relevant explanation as to why water droplets do not fall off after car waxing: 1. Increased water droplets: This is likely due to the quality of the car wax. There are many inferior car waxes circulating in the market, which often do not have good hydrophobic properties and may even perform worse than the original factory paint, resulting in water droplets. 2. Do not wash the car immediately after waxing: Otherwise, it can cause varying degrees of wax loss and fail to provide good hydrophobic effects. The protective wax on the car paint has not yet fully adhered.

5

4

Share

What Causes the Noise from an Aftermarket BMW Valve Cover?

Can turbocharged cars use semi-synthetic oil?

Which is better, 94V or 94W tires?

Which Dotted Line to Align with When Straightening the Car for Reverse Parking?

What is the maximum horsepower of domestic tractors?

What does 240 at the back of a CRV mean?

Why Do Water Droplets Not Fall Off After Car Waxing?

How much temperature difference can a windshield withstand?

How to Pry Open a Locked Car Door?

What is the tire pressure for motorcycle inner tubes?

Does a Faulty Engine Exhaust Valve Affect the Engine?