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What is the highest grade of motor oil?

3 Answers

StHadley

07/29/25 3:21am

Motor oil's highest grade is SA. Overview of motor oil: Motor oil, also known as engine lubricating oil, is called Engine-oil in English. Its density is approximately 0.91kg×10 cubic. It serves multiple functions for the engine including lubrication and wear reduction, auxiliary cooling, sealing and leak prevention, rust and corrosion protection, as well as shock absorption. Composition of motor oil: Motor oil consists of two parts: base oil and additives. Base oil is the main component of lubricating oil, determining its fundamental properties. Additives compensate for and improve the deficiencies in base oil performance, imparting certain new characteristics, making them an essential part of lubricating oil.

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DiKeegan

08/12/25 1:55pm

With years of experience in car repair, I often get asked about the highest oil grade. Currently, the highest API rating for automotive engine oil is SP, designed for gasoline engines, replacing the older SN standard since 2020. Why is SP superior? It incorporates new additives to address low-speed pre-ignition issues, offering better protection for modern turbocharged and direct-injection engines while reducing wear and extending engine life. The practical benefits are notable too—slightly improved fuel efficiency and cleaner emissions. When selecting oil, pair the API rating with SAE viscosity (e.g., 0W-20), which suits most modern cars—don’t just focus on price over grade. Regular SP oil changes help your car run smoother and longer; always check your owner’s manual for the recommended grade.

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BraxtonLee

10/02/25 6:01am

As an ordinary car owner who has driven for ten years, I've used various engine oils and found that the highest API rating is SP. This standard was introduced in 2020 and is recommended for new cars as it helps prevent low-speed pre-ignition issues and may slightly reduce fuel consumption. When combined with SAE viscosity grades like 5W-30, it ensures smoother cold starts in winter and quieter operation at high speeds. From my personal experience, SP-rated oil provides superior engine protection, reducing concerns about carbon buildup. Always check the API donut symbol on the bottle to confirm genuine SP certification—don't compromise by buying lower-grade products to save money, as choosing SP oil saves costs in the long run while offering peace of mind.

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What is the usage of car lights?

Car light usage is divided into daytime running lights, high beam and low beam lights, and turn signals. The specific introductions are as follows: Daytime running lights: Daytime running lights, also called position lights, serve to make the four corners of the vehicle visible to others, with lower brightness than headlights. These lights should be turned on during rain, dim lighting conditions, or in underground parking lots. High beam and low beam lights: High beams have a higher projection angle than low beams, allowing them to illuminate objects that are higher and farther away. Low beams are generally used on roads with street lighting. High beams are used on roads without lighting and are often employed to illuminate road signs in the distance. Turn signals: Turn signals must be activated in advance when the vehicle needs to turn. Only after confirming there are no vehicles approaching from behind should the turn be made. Avoid turning immediately after signaling without checking the rear situation. Before overtaking, activate the left turn signal and confirm that the road ahead meets overtaking conditions. If a vehicle behind intends to overtake, the right turn signal can be activated to indicate permission. At U-turn or turning lanes before traffic lights, unless you are first in line, there is no need to keep the turn signal on continuously. It is not too late to activate the turn signal when the vehicle actually turns.

Should You Shift Gears or Release the Handbrake First When Parking?

For manual transmission cars, to prevent rolling, it is standard practice to shift into gear before releasing the handbrake. For automatic transmission cars, there is no need to shift into gear when parking, although many automatic cars support gear shutdown; the first step is to firmly engage the handbrake. Parking steps: Parking: When preparing to pull over, always signal in advance to alert vehicles behind and pedestrians nearby. Check the rearview mirror to ensure no one is there before choosing to park. Shifting Gears: Without releasing the brake, shift into N (Neutral) gear, then engage the handbrake and release the brake. Turning Off the Engine: Turn off any unnecessary electrical devices in the car. Rotate the key counterclockwise to the end, or press the one-touch start/stop button to move the ignition switch to the OFF position.

What Causes the Creaking Noise in Audi's Panoramic Sunroof?

The primary reason for creaking noises in Audi's panoramic sunroof is often due to insufficient lubrication of mechanical components, causing the sliders to operate with difficulty or produce noise within the tracks. If this issue occurs, it is essential to apply lubricating grease to the sunroof's mechanical components. Maintenance methods for Audi's panoramic sunroof include: Regular Cleaning: After some use, sand and debris can accumulate in the sunroof's tracks and gaps. If not cleaned regularly, these particles can damage the sunroof components. Typically, after 2-3 months of use, the sealing strips or tracks should be cleaned with a cloth dampened in water and then dried. A small amount of lubricant can be applied afterward. Avoid Using Engine Oil or Grease: These types of oils are too viscous and tend to attract more dirt. For routine maintenance or before long-term parking, using fine talcum powder for cleaning can help extend the lifespan of the sealing rings. Avoid Opening the Sunroof on Bumpy Roads: It is best not to fully open the sunroof on rough roads, as excessive vibration between the sunroof and tracks can lead to component deformation or even damage the motor. Timely Replacement of Worn Parts: Aged rubber seals should be replaced promptly to ensure the sunroof remains properly sealed.

What kind of driver's license is needed to drive a taxi?

To drive a taxi, you need to hold a Class C or higher driver's license, or have at least 3 years of safe driving experience with a Class B2, B1, or A1 license. In addition to the driver's license, you must register with the local transportation management department, pass a unified training and examination, and obtain a taxi driver's qualification certificate issued by the transportation management department. Only after registration with the transportation management department can you engage in taxi operations. To drive a taxi, you also need the following documents: Taxi driver's work permit; Vehicle registration certificate; Health certificate. Taxi drivers must also meet the following requirements: Have a permanent residence in the local jurisdiction, be between 18 and 55 years old, have good conduct, and no criminal record; Possess good professional ethics and at least a junior high school education, be in good health, and free from infectious diseases; Be familiar with the local streets, routes, and geographical locations; Specific requirements for the taxi driver's qualification certificate: No records of traffic crime, dangerous driving crime, drug use, or drunk driving, and no accumulation of 12 penalty points in the last 3 consecutive scoring cycles; No records of violent crimes; Other conditions stipulated by the local municipal government.

Can Temporary License Plate Speeding Violations Be Captured?

Temporary license plate speeding violations can be captured. The specific introduction about temporary license plates is as follows: Definition: A paper motor vehicle license plate that permits temporary road use, also known as a temporary driving license plate. It refers to the temporary vehicle driving certificate issued by the public security vehicle management department for newly purchased vehicles before official registration. The validity period of a temporary license plate generally does not exceed thirty days. Applying for a Temporary License Plate: New cars without license plates are not allowed on the road; otherwise, they will be fined 200 yuan and have 12 points deducted. After purchasing a new car, the owner must promptly complete the motor vehicle registration procedures or apply for a temporary driving license plate. Before driving on the road, the owner can apply for a temporary driving license plate from the traffic management department of the public security authority (vehicle management office) by providing identification, vehicle purchase invoice, new vehicle certificate, compulsory traffic insurance certificate, or import certificate and copies of relevant documents.

What Causes Abnormal Noises When a Car Turns?

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