Why Does Instantaneous Fuel Consumption Increase When Braking?

Should the Focus use 5W30 or 5W40 engine oil?

The Focus originally uses semi-synthetic engine oil, model 5W-30, with a replacement capacity of 4L and a replacement cycle of 5000km. If you want to change the engine oil during later maintenance, you can choose brands such as Shell or Castrol. The viscosity of engine oil changes with temperature, so special attention should be paid to its performance under low and high temperatures. For example, in 5W-30, the first number indicates low-temperature fluidity, where 5W represents the ability to withstand temperatures as low as -30°C. The smaller this number, the better the low-temperature fluidity, making cold starts smoother. The latter number represents the kinematic viscosity of the oil at 100°C. A higher value means the oil can maintain its viscosity index better at high temperatures, which can also be understood as better lubrication performance under high-temperature conditions. The method for changing the Focus's engine oil is as follows: Wait for the engine temperature to drop, allowing the oil to flow back into the oil pan; Use a wrench to loosen the oil drain plug, and use an oil pan to catch the old oil until no more oil flows out. Start the engine for about 30 seconds to allow the oil in the main oil passage to drain; Use a special wrench to remove the oil filter; apply oil to the seal of the new oil filter and tighten it clockwise by hand; Add the new engine oil through the oil filler cap on the engine valve cover, typically filling about three-quarters of a 4L bottle; Start the engine and let it run for 5 minutes, checking for oil leaks around the drain plug and oil filter. If leaks are found, repairs should be made; After stopping the engine, pull out the oil dipstick and check that the engine oil level is within the standard range.

19

4

Share

Which Vehicles Are Exempt from Expressway Tolls?

Vehicles exempt from expressway tolls include national military and armed police vehicles; trucks that meet the requirements of the "Green Channel" policy; and small passenger vehicles with fewer than 7 seats during major holidays. Here is some relevant information about expressway toll exemptions: 1. Toll-Free Periods: There are a total of 22 days, covering the following holidays: Spring Festival, from 00:00 on February 11 (New Year's Eve) to 24:00 on February 17 (the sixth day of the lunar new year), totaling seven days; Qingming Festival, from 00:00 on April 3 (Saturday) to 24:00 on April 5 (Monday), totaling three days; Labor Day, from 00:00 on May 1 (Saturday) to 24:00 on May 5 (Wednesday), totaling five days; National Day, from 00:00 on October 1 (Friday) to 24:00 on October 7 (Thursday), totaling seven days. 2. Implementation Timeline: The toll-free expressway policy during statutory holidays was first implemented during the 2012 National Day holiday.

5

0

Share

Which accelerates faster, electric cars or gasoline cars?

Gasoline cars accelerate faster. Here are the specific details: 1. Reason: Gasoline cars indeed have faster acceleration because the conversion of electrical energy to kinetic energy is much quicker than that of fuel to kinetic energy. 2. Pure Electric Vehicles: Also known as battery electric vehicles, these are vehicles powered by a pre-charged battery that supplies electricity to an electric motor, which then propels the vehicle. The battery's charge is replenished by an external power source, and these vehicles meet all road traffic and safety regulations. Due to their relatively smaller environmental impact compared to traditional cars, their future prospects are widely optimistic. 3. Components of Electric Vehicles: The components include the electric drive and control system, mechanical systems for power transmission, and working devices to accomplish set tasks. The electric drive and control system is the core of an electric vehicle and the biggest difference from internal combustion engine vehicles. This system consists of the drive motor, power source, and motor speed control device, among others. Other components of electric vehicles are essentially the same as those in internal combustion engine vehicles. 4. Working Principle: Battery → Current → Power regulator → Motor → Power transmission system → Drives the vehicle forward.

10

0

Share

What are the clutch control techniques for Subject 2?

There are three main clutch control techniques for Subject 2, which are the correct way to press the clutch, controlling the lifting range of the clutch, and feeling the vibration frequency of the car body. The following is the detailed introduction: 1. Clutch pressing action: The standard action for pressing the clutch is to place the front part of the foot on the clutch pedal, with the heel on the ground, then press the clutch to the lowest point, keeping the knee bent without lifting the heel. If not, adjust the seat distance forward or backward. 2. The range of pressing and lifting the clutch: The clutch is quite sensitive. When the speed is too fast, do not expect to press the clutch suddenly to reduce the speed. The correct method is to press it down slowly to reduce the car's power, thereby achieving the effect of deceleration. 3. Feeling the car body vibration: After the clutch reaches the semi-engagement starting point, you can feel the engine vibrating. When there is a slight vibration, you can basically release the brake and drive, and the speed at this time is more suitable for the test. However, when starting on a semi-slope, you should wait until the car body vibrates significantly before releasing the brake, otherwise the car's power will not be enough to climb the slope, and it will roll back once the brake is released.

15

4

Share

Can Low-Pressure Cast Wheels Be Used for High-Speed Driving?

Casting wheel strength is calculated through design, and as long as they meet standards, there are no safety hazards. Below is relevant information: Gravity Casting Method: This method uses gravity to pour aluminum alloy solution into a mold. After forming, the wheel is processed and polished on a lathe to complete production. The manufacturing process is relatively simple, does not require precise casting techniques, and is cost-effective with high production efficiency. However, it is prone to bubbles (sand holes), uneven density, and insufficient surface smoothness. Many early models from Geely used wheels produced this way, though newer models have mostly switched to updated wheel designs. Forging Method: An entire aluminum ingot is directly extruded into shape on a mold using a thousand-ton press. The advantages include uniform density, smooth and refined surfaces, thin and lightweight wheel walls, and the highest material strength—over 30% higher than cast wheels. However, this method requires advanced production equipment, has a yield rate of only 50-60%, and incurs higher manufacturing costs.

16

5

Share

Does car film continuously release formaldehyde?

Car film does not continuously release formaldehyde; it typically dissipates within about half a month. Car films can generally be divided into three types: composite process film, dyed film, and vacuum thermal evaporation film. Composite process film: Its primary function is to block intense sunlight. This is an earlier type of car film, which basically lacks heat insulation properties. It was initially called sun paper or tea paper. Dyed film: Most dyed car films on the market use deep-dyeing technology, incorporating heat-absorbing agents through deep-dyeing methods to absorb infrared rays from sunlight and achieve heat insulation. However, since it also absorbs visible light, the visible light transmittance is insufficient, and due to inherent process limitations, the clarity is relatively poor. Vacuum thermal evaporation film: This type uses vacuum thermal evaporation technology, where an aluminum layer is evaporated onto the base material to achieve heat insulation. The functions of car film include safety, clarity, anti-glare, heat insulation, and further protection of the privacy of vehicle occupants, enhancing driving safety to a certain extent. After applying car film, a certain amount of formaldehyde is produced. Prolonged exposure to this environment can have adverse effects on health, so timely ventilation and odor removal are necessary to maintain effectiveness. Car film can also help preserve the car's paint.

8

3

Share

Why Does Instantaneous Fuel Consumption Increase When Braking?

Should the Focus use 5W30 or 5W40 engine oil?

Which Vehicles Are Exempt from Expressway Tolls?

Which accelerates faster, electric cars or gasoline cars?

What are the clutch control techniques for Subject 2?

Can Low-Pressure Cast Wheels Be Used for High-Speed Driving?

Does car film continuously release formaldehyde?

Will there be any impact if the car door is removed and then reinstalled?

What does it mean to sweep the line during reverse parking?

How many kilowatt-hours of electricity does an electric car need overnight?

Is the Vehicle Certificate of Conformity Issued Simultaneously with the Car?