What is the difference between 10w-40 and 5w-40?

1 Answers
LeRylee
07/29/25 5:32pm
10w-40 and 5w-40 mainly have the following differences: 1. Both 5w-40 and 10w-40 are oil viscosity grades. The letter W stands for Winter, and in fact, oils with the W letter are all-season oils suitable for both winter and summer. 2. The number 40 represents the high-temperature viscosity grade of the oil. The larger the number, the stronger the high-temperature viscosity of the oil, the thicker the oil film, and the better the sealing and protective capabilities. 3. The numbers 5 and 10 represent the minimum applicable temperature of the oil, or its low-temperature fluidity. 10 indicates that the minimum applicable temperature of the oil is -25 degrees Celsius, while 5 indicates that the minimum applicable temperature of the oil is -30 degrees Celsius.
Was this review help?
4
5
Share
More Forum Discussions

What to Do When the Steering Wheel Pulls to One Side?

1. Check Tire Pressure: Uneven tire pressure is a common cause of steering pull. Visit a maintenance facility to measure and ensure all tires have consistent pressure. Additionally, uneven tread wear can also cause pulling, requiring tire rotation or replacement. 2. Wheel Alignment: A standard method to correct steering pull. 3. Inspect Suspension: If wheel alignment doesn't resolve the issue, consider potential suspension problems. Poor suspension design or damage, deformation, or misalignment from use can easily cause pulling. 4. Check Steering System: Prolonged wear may lead to excessive gaps in connecting parts or loose bearings, preventing the car from following a normal trajectory and causing steering pull.
4
1
Share

Why is there a lot of water dripping from the exhaust pipe after parking?

The reason for a lot of water dripping from the exhaust pipe after parking is: The accumulation of water droplets in the condenser is a sign of complete combustion of gasoline in the engine. When gasoline is fully burned, it produces water vapor and carbon dioxide. When the ambient temperature is low, the white smoke coming out of the exhaust pipe is water vapor. As the water vapor flows through the metal pipe, it condenses into water droplets. The exhaust pipe is only connected to the cylinder and not to any other components, so it is impossible for liquid water to be discharged from the cylinder. The water comes from the exhaust gas, where the hydrogen (H) in the gasoline combines with oxygen (O) to form water (H2O). At this time, due to the high exhaust temperature, the water exists in the form of water vapor. When the temperature drops at the end of the exhaust pipe, some of the water vapor condenses into small water droplets that adhere to the inner wall of the exhaust pipe. As more and more accumulates, it forms water and flows out.
7
2
Share

What is the fuel tank capacity of the CR-V?

The fuel tank capacity of the CR-V is 58 liters. Automobile fuel tanks can be categorized into standard fuel tanks and heated fuel tanks based on their functions. The design principle of a heated fuel tank is as follows: 1. Utilizing the thermal energy generated by the engine during operation, an additional thermal circulation system is installed between the engine, fuel tank, and radiator; 2. The original single fuel tank is redesigned into a combined fuel tank consisting of a main tank and an auxiliary tank. The CR-V is a classic urban SUV model produced by Dongfeng Honda. It features a stylish and dynamic exterior design with smooth, rounded lines that maintain a sporty appeal. The overall driving and passenger space is spacious and ample, with no noticeable tightness in head or legroom. The interior offers abundant and practical storage spaces, and the seats provide excellent support and comfort.
9
1
Share

How to Turn on the Car Brake Light?

Car brake lights are controlled by the moment of pressing and releasing the brake pedal to turn them on and off. Installed at the rear of the vehicle, the brake light features a red main body color to enhance light penetration, ensuring that following vehicles can spot the car ahead under low visibility conditions, thereby preventing rear-end collisions. The principle of the brake light switch is as follows: when the brake pedal is pressed, it pushes down the switch contact point to connect the brake light circuit, illuminating the light. Releasing the brake pedal disconnects the switch contact, turning off the brake light.
15
3
Share

How to Deal with Foggy Car Windshield on Rainy Days?

Press the defogging button, turn on the air conditioning cooling (A/C) switch, set the temperature to the lowest, and turn on the external circulation to defog. Both cold and warm air can be used to defog the car windshield, but warm air is slower than cold air. The most effective method is to use cold air, which blows dry cold air directly onto the glass, preventing water vapor from condensing on the glass and achieving the purpose of defogging. The method of using warm air to defog is the same as using cold air, but it should be noted that warm air should not be used for defogging on rainy days, as it may initially increase fogging. When the car windshield fogs up, turn on the external circulation. The reason for car windshield fogging: There is a certain temperature difference between the inside and outside of the car. If the temperatures inside and outside the car are different, the surface of the side with the lower temperature will have a lower saturated vapor pressure than the surrounding environment, causing water vapor to gather on the glass surface and form tiny water droplets, resulting in fogging. Methods to defog the car windshield: Air Conditioning Cooling: Use the dehumidification function of the air conditioning system to reduce air humidity and remove fog. In summer, especially when multiple people enter the car and the air conditioning is not turned on in time, the high humidity of exhaled air can quickly cause the windshield to fog up. At this time, turn on the air conditioning and blow cold air onto the windshield. Using the dehumidification function of the air conditioning system, the fog on the windshield can be removed quickly. However, if the humidity is too high and the air conditioning is not effective enough, slightly opening the windows can quickly reduce the humidity inside the car. Of course, combining this with the air conditioning can speed up the process. Air Conditioning Warm Air: Use the method of reducing the temperature difference to remove fog. In winter, blowing warm air onto the glass can quickly raise the temperature of the windshield, reducing the temperature difference between the inside and outside surfaces of the glass, thereby preventing excessive fogging. However, it should be noted that the rear and side windows heat up more slowly, so it takes longer to completely remove the fog. Whether the air conditioning is automatic or manual, turning it on helps with dehumidification. The temperature control of the air conditioning should not be set to the coldest position, as this may cause fogging on the outer surface of the windshield over time. Applying Anti-Fog Spray or Other Preventive Measures: Spray a small amount of defogging agent on the car windows and wipe it clean to remove dirt and stains. While polishing the glass, a thin transparent protective film is formed, which effectively prevents water vapor from condensing on the glass and forming fog. This is especially suitable for cold winters. Alternatives to anti-fog spray include dish soap, soapy water, glycerin, alcohol, or salt water. After applying and letting it dry, use a chamois or soft dry cloth to remove excess residue. This can keep the car windows fog-free for several days. Opening Windows for Air Circulation: If the fog inside the car is not too heavy, you can open the windows on both sides to create air circulation between the inside and outside of the car, reducing the temperature difference and gradually eliminating the fog. The principle of this method is the same as using cold air from the air conditioning. However, the downside of opening windows for air circulation is obvious—it cannot be used during rain, snow, on highways, or when the fog is too heavy. Rear Window Heating: Most cars have a rear window heating function, although the button positions may vary, the function is the same. Turn on the rear window heating switch, and the fog on the rear window will disappear in about a minute.
1
3
Share

What causes the clicking sound when the car fails to start?

The reason for hearing a clicking sound when the car fails to start is usually due to insufficient battery power or low voltage. Before turning off the car, forgetting to turn off the headlights or some electrical equipment can drain the battery, leading to insufficient power. Additionally, if the battery has been used for too long and is severely aged, the voltage may be insufficient, requiring replacement. Methods for maintaining the car battery include: 1. Avoid excessive discharge of the battery; if discharged excessively, recharge it promptly; 2. If the vehicle is unused for a long time, disconnect the battery power; 3. Prevent short circuits in the battery; 4. Regularly check if the connections are secure and if the terminal surfaces are clean to ensure good contact; 5. Never place metal tools or conductive objects near the battery terminals to avoid short circuits.
3
5
Share
Cookie
Cookie Settings
© 2025 Servanan International Pte. Ltd.