What Does Four-Stroke Engine Oil Mean?

What do the gear letters in a car represent?

Cars are divided into automatic and manual transmissions, with automatic transmission cars having gears marked with letters. The gear positions on a car are as follows: 1. P: Park. 2. R: Reverse. 3. N: Neutral. 4. D: Drive. 5. S: Sport mode. 6. L: Low gear. Here is more detailed information about the gears: 1. P stands for Park gear: When a car needs to be parked for a long time, shifting to P gear prevents the car from rolling because the car is in a mechanical lock state. P gear must only be used when the car is completely stopped; otherwise, it may damage the locking mechanism and the transmission. 2. R gear represents Reverse gear: Used when the car is reversing. Before reversing, the car must be completely stopped, and the safety button on the shift lever must be pressed to move the lever to R gear. 3. N gear stands for Neutral gear: This gear is not used for long periods. The working principle of Neutral gear is the same in both automatic and manual transmission cars. It is typically used when waiting at traffic lights. When the car is in Neutral, the connection between the transmission and the engine's power system is disconnected. 4. D gear represents Drive gear: Drive gear is the most frequently used gear. When in Drive, the transmission automatically shifts gears based on the car's speed, enabling automatic gear changes. The saying 'D gear for all situations' refers to this gear. 5. S gear stands for Sport mode: Sport mode is mainly used when going uphill or overtaking. The car can switch to Sport mode while driving. After switching to Sport mode, the engine's RPM increases rapidly, and the car's speed also improves. 6. L gear represents Low gear: This gear is equivalent to first gear in a manual transmission car. It is primarily used during long downhill descents, allowing the car to maintain the lowest gear and reducing the need for constant braking.

10

5

Share

What does 16v engine mean?

16v engine refers to an engine with 16 valves. For engines of the same displacement, more valves generally mean better performance. To improve intake and exhaust efficiency, multi-valve technology is now widely used. It is common to have 4 valves per cylinder, so a 4-cylinder engine would have a total of 16 valves, hence the designation 16V. Below is some extended information about valves: 1. The function of valves is to specifically input air into the engine and expel the exhaust gases after combustion. Structurally, valves are divided into intake valves and exhaust valves. The intake valve's role is to draw air into the engine to mix with fuel for combustion, while the exhaust valve's role is to expel the burned gases and dissipate heat. 2. Valves are responsible for inputting fuel into the engine and expelling exhaust gases. Traditional engines have only one intake valve and one exhaust valve per cylinder. This design is relatively simple, cost-effective, easy to maintain, and performs well at low speeds. However, the drawback is that it is difficult to increase power, especially at high speeds where the air charging efficiency is low and performance is weaker.

5

3

Share

Where is the Roewe i5 engine produced?

Roewe i5's engine is assembled by SAIC Motor Corporation Limited, with the technology provided by SAIC, making it a domestically produced engine. The engine model used in the Roewe i5 is the 15S4C, with a maximum horsepower of 120 hp, a maximum power output of 88 KW, a maximum power speed of 6000 rpm, and a peak torque of 150 Nm. For the daily maintenance of the Roewe i5's engine, the following methods can be used: Use lubricating oil of appropriate quality grade. For gasoline engines, choose SD--SF grade gasoline engine oil based on the additional devices of the intake and exhaust systems and usage conditions; for diesel engines, select CB--CD grade diesel engine oil according to mechanical load, with the selection standard not lower than the manufacturer's specified requirements. Regularly change the engine oil and filter. The quality of any grade of lubricating oil will change during use. After a certain mileage, the performance deteriorates, which can cause various problems for the engine. To avoid failures, change the oil regularly based on usage conditions and keep the oil volume moderate. When engine oil passes through the fine holes of the filter, solid particles and viscous substances in the oil accumulate in the filter. If the filter is blocked and the oil cannot pass through the filter element, it may burst the filter element or open the safety valve, allowing the oil to bypass through the bypass valve and bring contaminants back to the lubrication area, accelerating engine wear and increasing internal pollution. Regularly clean the crankcase. During engine operation, high-pressure unburned gases, acids, moisture, sulfur, and nitrogen oxides from the combustion chamber enter the crankcase through the gap between the piston rings and cylinder walls, mixing with metal powder generated by part wear to form sludge. A small amount remains suspended in the oil, while a large amount precipitates, clogging the filter and oil holes, making engine lubrication difficult and causing wear. Regularly use a radiator cleaner to clean the radiator. Removing rust and scale not only ensures the engine operates normally but also extends the overall lifespan of the radiator and engine.

10

1

Share

How to Measure Car Battery Drain with a Multimeter?

Using a multimeter to measure car battery drain is as follows: 1. Set the multimeter to the correct range. The multimeter has ranges for measuring voltage, resistance, and current. To measure car battery drain, turn the knob to the current measurement range. 2. Select the measurement range. For most cars, the 20A range is selected, and the red probe is inserted into the socket marked 20A. 3. After adjusting the multimeter, turn off the car engine, switch off all electrical devices, and lock the doors. 4. Open the hood, disconnect the negative terminal of the battery, connect the red probe of the multimeter to the car body ground wire, and connect the black probe to the negative terminal of the battery. Observe the current displayed on the multimeter. Normal battery drain should be below 30-50mA. If the multimeter shows a value exceeding 0.05, it indicates significant battery drain in the car.

12

5

Share

How to adjust the time on Honda CR-V?

Honda CR-V time adjustment method is as follows: 1. Turn off the ignition switch, then rotate the light switch to turn on the parking lights. 2. Press and hold the instrument button for a while, the hour zone on the instrument panel will start flashing, then release the button. 3. Press the button again, each press increases by one hour. After adjusting the hour, do not touch the button. 4. After flashing 5 times, it will automatically switch to minute adjustment. Use the same method to adjust the minutes. Below is some information about the Honda CR-V: 1. The Honda CR-V is a classic urban SUV model produced by Dongfeng Honda. It features a sporty and fashionable design with excellent handling performance. 2. In terms of exterior, the new Honda CR-V adopts Honda's latest family design language, with a more rugged styling. The large chrome grille is eye-catching, and the sharp LED headlights on both sides connect seamlessly with the grille. The front face incorporates many three-dimensional lines. The rear retains the controversial but very sexy "fat butt" design from the previous generation, but also adds rugged lines, giving it an overall stable feel. The C-shaped LED taillights perform well in terms of both design and visibility when lit. 3. The interior of the new Honda CR-V has become more refined and includes many technological elements. The cabin uses soft plastic materials extensively, and the passenger seat features leather wrapping, aiming to close the gap with mainstream competitors in terms of materials. 4. In terms of power, the new Honda CR-V is equipped with a 1.5T turbocharged engine, delivering a maximum power of 142kW/5600rpm and a maximum torque of 243Nm/2000-5000rpm, paired with a CVT continuously variable transmission.

15

5

Share

What is the fuel consumption of the Lavida 1.4T?

The average fuel consumption of the Lavida 1.4T automatic Comfort version is 8.61L per 100 kilometers. This car is relatively fuel-efficient, but fuel consumption is related to various factors, so the actual fuel consumption should be based on real-world usage. The main factors affecting fuel consumption include the following situations: 1. Incorrect driving can consume 2 to 3 times more fuel. Improper driving habits have the greatest impact on fuel consumption. During driving, especially in heavy traffic, at red lights, or when changing lanes, sudden acceleration and braking are the most common issues. 2. Road conditions. Highways are more fuel-efficient than city driving; asphalt roads are more fuel-efficient than concrete roads; paved roads are more fuel-efficient than off-road surfaces; flat roads are more fuel-efficient than slopes; closed roads are more fuel-efficient than open roads; straight roads are more fuel-efficient than curves. 3. Insufficient tire pressure increases fuel consumption by 1%. Maintaining normal tire pressure is also a good way to reduce fuel consumption. If the tire pressure is insufficient, rolling resistance will significantly increase. If the tire pressure is 2 psi (pounds per square inch) below the specified value, fuel consumption will increase by 1%. Misaligned or excessively worn tires may also increase fuel consumption. 4. Long idling without turning off the engine or frequent ignition. When encountering long waits without needing to move the vehicle, it is recommended that the owner turn off the engine.

17

3

Share

What Does Four-Stroke Engine Oil Mean?

What do the gear letters in a car represent?

What does 16v engine mean?

Where is the Roewe i5 engine produced?

How to Measure Car Battery Drain with a Multimeter?

How to adjust the time on Honda CR-V?

What is the fuel consumption of the Lavida 1.4T?

What are the reasons why an automatic transmission car does not move when shifted to R gear?

What is the normal width of a sedan?

What are the reasons for the insufficient cooling of the Bisu T5 air conditioner?

In which year was the Volkswagen R36 discontinued?