How to Distinguish Between High and Low Engine Oil Viscosity?

1 Answers
VonNova
07/30/25 6:34am
Methods to distinguish between high and low engine oil viscosity: Look at the quality grade, the higher the grade, the better. The viscosity grade of engine oil is established by the "Society of Automotive Engineers," abbreviated as "SAE" in English. The oil can is labeled with something like SAE5W40, where the number before W represents the low-temperature grade of the oil. The smaller the number, the better the low-temperature performance of the oil, such as cold starts. Engine oil, also known as engine lubricant, serves to lubricate and reduce friction, assist in cooling, seal against leaks, prevent rust and corrosion, and provide shock absorption for the engine. Engine oil consists of two parts: base oil and additives. The base oil is the main component of lubricating oil, determining its basic properties, while additives compensate for and improve the shortcomings of the base oil's performance, granting it certain new properties, making them an important part of lubricating oil.
Was this review help?
17
2
Share
More Forum Discussions

What is the fuel consumption of the VV5?

The 2020 Wey VV5 has 4 available models. Among them, the 2020 2.0T two-wheel drive Qing Pioneer has an NEDC fuel consumption of 7.1L per 100km. The 1.5T two-wheel drive Zhi Pioneer, Yan Pioneer, and Chao Pioneer models have an NEDC fuel consumption of 6.6L per 100km. The fuel tank capacity of the 2020 Wey VV5 is the same for all models, at 55L. The distance that can be covered on a full tank of fuel is as follows: For the 2020 2.0T two-wheel drive Qing Pioneer, the distance on a full tank is 55/7.1*100=774km. For the 1.5T two-wheel drive Zhi Pioneer, Yan Pioneer, and Chao Pioneer models, the distance on a full tank is 55/6.6*100=833km. The fuel consumption of a car is directly related to five major factors: driving habits, the car itself, road conditions, natural wind, and environmental temperature. Specific factors that can increase fuel consumption are as follows: Driving habits: Aggressive driving, such as sudden acceleration, frequent overtaking, and not easing off the throttle before a red light, can increase fuel consumption. The car itself: Cars with larger engine displacements generally consume more fuel than those with smaller displacements because larger displacements usually mean higher power output, requiring more gasoline to burn and perform work. Heavier cars also consume more fuel because greater weight requires more driving torque. Road conditions: Driving on dirt roads, muddy roads, soft surfaces, or mountainous roads increases resistance and fuel consumption. Natural wind: Driving against the wind or on windy days increases resistance and fuel consumption. Low environmental temperatures: When the engine block is cold, the injected gasoline does not atomize easily during cold starts, requiring more gasoline to be injected for combustion, which increases fuel consumption. Additionally, at low temperatures, the engine's computer may control the engine to run at higher RPMs to warm up, which also increases fuel consumption.
16
2
Share

What vehicles can be driven with driving license types A, B, and C?

Here are the types of driving licenses and the corresponding permitted vehicles: 1. A1: Permitted vehicles: Large passenger vehicles. Other permitted vehicle types: A3, B1, B2, C1, C2, C3, C4, M. 2. A2: Permitted vehicles: Heavy and medium-sized full trailers and semi-trailer motor vehicle trains. Other permitted vehicle types: B1, B2, C1, C2, C3, C4, M. 3. A3: Permitted vehicles: City buses with a capacity of 10 or more passengers. Other permitted vehicle types: C1, C2, C3, C4. 4. B1: Permitted vehicles: Medium-sized passenger vehicles (including city buses with a capacity of 10 to 19 passengers). Other permitted vehicle types: C1, C2, C3, C4, M. 5. B2: Permitted vehicles: Heavy and medium-sized trucks; heavy and medium-sized special-purpose vehicles. Other permitted vehicle types: C1, C2, C3, C4, M. 6. C1: Permitted vehicles: Small and mini passenger vehicles, as well as light and mini trucks; light and mini special-purpose vehicles. Other permitted vehicle types: C2, C3, C4.
5
2
Share

What does DUAL mean on the Haval H6?

The "DUAL" button in the car is the air conditioning zone control button. By pressing the DUAL switch, you can independently adjust the temperature of the air conditioning for either the driver's seat or the passenger seat. This allows for different temperature requirements from passengers in different positions within the car, enabling flexible adjustment and switching between different temperature zones. Ventilation System: Its function is to ensure indoor ventilation while the car is in motion, continuously introducing fresh air into the car interior and expelling air mixed with dust, carbon dioxide, and harmful gases from the engine. Heating System: Its function is to heat the air inside the car or the fresh air entering from outside, providing warmth and dehumidification. Cooling System: Its function is to lower the interior temperature when the external environment temperature is high, making passengers feel cool and comfortable. Air Purification System: Its function is to filter the incoming air, continuously removing polluted gases from the car interior to maintain clean air inside the car. Control System: The control system mainly consists of electrical components, vacuum lines, and operating mechanisms.
19
3
Share

What are the trunk dimensions of the Geely Haoyue?

Geely Haoyue trunk dimensions: depth 1550-2090mm, width 1220-1335mm, height 790mm, maximum capacity 2360L. Geely Haoyue body dimensions: The length, width, and height are 4835/1900/1780mm respectively, with a wheelbase of 2815mm. The trunk depth ranges from 1550-2090mm, width 1220-1335mm, height 790mm, maximum capacity 2360L. The second-row headroom is approximately 1 fist and 2 fingers, legroom varies from 1 fist to 3 fists. The third-row headroom is 1 fist and 2 fingers, with maximum legroom of 2 fists. Trunk features: Equipped with a practical power trunk function that can be opened and closed via switches inside the vehicle or the remote key. Features a hands-free trunk function that liberates both hands, especially convenient when loading items into the vehicle. Includes power trunk position memory, which is particularly beneficial for shorter individuals who might otherwise struggle to reach the closing mechanism. Both the power trunk and trunk position memory come as standard features across all trim levels.
7
2
Share

What brand is Jassltow tires?

It is Jassltow tires. As the only component in contact with the ground, tires play a crucial role. Qingdao Jialun Tire Co., Ltd. is a high-tech private enterprise group engaged in the research, development, production, sales, and international trade of all-steel radial tires, semi-steel radial tires, and related supporting products. Here is more relevant information: 1. Tires: Tires are circular elastic rubber products assembled on various vehicles or machinery for ground rolling. Usually mounted on metal rims, they support the vehicle body, cushion external impacts, ensure contact with the road surface, and guarantee the vehicle's driving performance. 2. Tire usage conditions: Tires are often used under complex and harsh conditions, enduring various deformations, loads, forces, and high and low temperatures during operation. Therefore, they must have high load-bearing performance, traction performance, and cushioning performance. At the same time, they are required to have high wear resistance and flex resistance, as well as low rolling resistance and heat generation. 3. Tire performance: The quality of tire performance directly affects the safety of drivers and passengers, highlighting the importance of tire performance. For this reason, various countries have established clear requirements for tire safety performance. With the rapid advancement of the automotive industry, consumers have begun to pay attention not only to the safety performance of tires but also to the overall comfort, handling stability, NVH, and other performance aspects of the vehicle. Automotive tires can be divided into two types according to their use: passenger car tires and truck tires.
4
1
Share

What does the i light on the dashboard mean?

i light is the brake system warning light. The introduction of the brake system and the conditions that the brake system must meet when the car is running are as follows: Basic introduction of the brake system: A series of special devices that can forcibly reduce the driving speed of the car. The brake system is mainly composed of four parts: the energy supply device, the control device, the transmission device and the brake. The main function of the brake system is to slow down or even stop the moving car, to keep the speed of the car going downhill stable, and to keep the stopped car stationary. When the car is running, the brake system must meet the following conditions: Good braking performance; The indicators to evaluate the braking performance of the car are: braking distance, braking deceleration, and braking time. Easy to operate and good directional stability during braking. During braking, the braking force distribution between the front and rear wheels should be reasonable, and the braking force on the left and right wheels should be basically equal to avoid deviation and side slip during braking. Good braking smoothness; Braking should be gentle and smooth, and the release should be quick and thorough. Good heat dissipation and easy adjustment. This requires that the brake shoe friction lining has strong high-temperature resistance, quick recovery ability after wetting, adjustable clearance after wear, and can prevent dust and oil. When towing a trailer, the trailer can brake before the main vehicle and release the brake after the main vehicle. When the trailer is disconnected, it can brake automatically.
15
3
Share
Cookie
Cookie Settings
© 2025 Servanan International Pte. Ltd.