What does the 'w' in motor oil specifications mean?

1 Answers
OJulian
07/30/25 1:59am
The 'w' in motor oil specifications indicates that the oil can be used normally in winter. The number before 'w' represents the cold-start performance, with a smaller number indicating better low-temperature fluidity of the oil. The number after 'w' represents the kinematic viscosity of the oil, with a higher value indicating higher viscosity. The functions of motor oil are: 1. To alleviate friction and high temperatures; 2. To cool and reduce temperature; 3. To clean and remove impurities; 4. To dampen vibrations and cushion impacts; 5. To prevent rust and corrosion. Motor oil, also known as engine lubricating oil, is composed of base oil and additives. The base oil is the main component of lubricating oil, determining its basic properties, while additives can compensate for and improve any deficiencies in the performance of the base oil.
Was this review help?
7
0
Share
More Forum Discussions

How fast is the Kawasaki H2?

Kawasaki H2's top speed is theoretically 420km/h at 16,000 rpm; currently, it reaches 400km/h at 14,500 rpm. Here is more information about the Kawasaki H2: 1. The Kawasaki H2 is a high-performance motorcycle under the Kawasaki brand. 2. The Kawasaki H2 is equipped with a 998cc four-stroke supercharged engine. Supercharging technology can increase the engine's air intake based on continuously improving engine displacement. 3. The motorcycle's engine uses fuel and air as its energy source. If the air intake is increased and the fuel injection is correspondingly increased, it is equivalent to increasing the amount of fuel in the cylinder.
2
0
Share

What does the TC light with a slash indicate in the Buick Excelle?

The TC light with a slash in the Buick Excelle indicates a tire pressure deficiency. The owner should immediately stop to check the tire pressure. After adjusting the tire pressure to a consistent level, the light will turn off. If this does not resolve the issue, a reset may be required. Below is relevant information about the 2021 1.3T Automatic Light Hybrid Base Model Excelle: 1. Powertrain: Equipped with a 1.3L turbocharged 3-cylinder engine, paired with a 6-speed automatic manual transmission. 2. Body Dimensions: The length, width, and height are 4609mm, 1798mm, and 1486mm respectively. The wheelbase is 2640mm. 3. Chassis: The drivetrain is front-engine, front-wheel drive. The front suspension is a MacPherson independent suspension, and the rear suspension is a multi-link independent suspension.
4
1
Share

How to Open the Hood of a BMW?

Method to open the hood of a BMW: 1. First, pull the switch located on the driver's side, to the left of the driver's left foot. A single pull will cause the hood to release with a "pop" sound. 2. Walk to the front of the hood. Most BMWs have a hook in the middle of the hood. Pinch it and lift the hood, then use the support rod inside to hold the hood open. More information about BMW: BMW is a German luxury car brand. Its vehicle series include the i, X, Z, and pure numeric models (1, 2, 3, 4, 5, 6, 7, 8 series), as well as the M series, which is based on improvements to the standard models. BMW's headquarters are located in Munich, Bavaria, Germany. The blue and white BMW logo reflects the colors of the Bavarian state flag.
4
5
Share

Does the insurance company cover engine water damage?

Engine water damage is covered by insurance, but if the car engine is started after being flooded, the insurance company will refuse to compensate. Below are the relevant details about the compensation: 1. Compensation conditions: The main losses caused by heavy rain to vehicles include flooding leading to water ingress, damage to vehicle seats, circuits, and other components; collision damage from vehicles drifting in water; towing and rescue cost losses; car water damage insurance coverage includes towing fees, rescue fees, and repairs to in-car electronics due to heavy rain. 2. Compensation principle: In the case of a used car being damaged but not totaled, the replaced parts are compensated based on the price of new original parts. When a used car needs repair due to damage, it is repaired with new parts, and the cost is based on the price of new car parts, with the repair labor cost calculated according to current standards.
19
3
Share

Which FAW-Volkswagen models are equipped with particulate filters?

FAW-Volkswagen models such as the Tayron and the 2021 Magotan 1.4T are equipped with particulate filters. A particulate filter is a ceramic filter installed in the exhaust system of diesel engines, designed to capture particulate emissions before they are released into the atmosphere. It can reduce soot emissions from diesel engines by more than 90%, and the captured particulate matter is subsequently burned off during vehicle operation. How the particulate filter works: The diesel particulate filter is coated with metals such as platinum, rhodium, and palladium. The black smoke containing carbon particles emitted by the diesel engine enters the particulate filter through a dedicated pipe. Inside the filter, densely arranged bag-type filters capture the carbon particles on a metal fiber felt filter. When the accumulation of particles reaches a certain level, a burner at the end automatically ignites, burning off the captured carbon particles and converting them into harmless carbon dioxide, which is then released. To check if a FAW-Volkswagen model has a particulate filter, you can use the following three methods: Check the and to see if the particulate filter function is mentioned. Additionally, carefully review the fault codes in the manual to see if there is a "particulate filter" warning light indicator. Look at the label on the oil filler cap. If the cap clearly states 0W-20 grade oil, it indicates the presence of a particulate filter. Check the exhaust pipe behind the three-way catalytic converter for an additional cylindrical section. If present, this is the particulate filter.
16
3
Share

What to Do When a Mercedes Key Fob Battery Dies?

When a Mercedes key fob runs out of battery, simply replace the battery. The specific steps are as follows: 1. Slide the small toothed switch at the end of the key fob to the right, which will release the manual key. 2. Pull out the key and gently insert it into the hole behind the key slot to engage with the battery cover latch. Gently pry it open to remove the cover. 3. Once opened, the battery will be visible. 4. Press lightly on the battery to pop it out, replace it with a new one, and then close the key cover. Here are some important notes: 1. Different vehicle models may have different methods for opening the key fob. 2. Generally, replacing the battery as soon as it starts to run low can prevent many inconveniences.
20
3
Share
Cookie
Cookie Settings
© 2025 Servanan International Pte. Ltd.