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What do the markings on engine oil represent?

1 Answers
StLilliana
07/29/25 1:41pm
Engine oil has two types of markings: SAE and API, each with different meanings. SAE Marking: "5W-30" is an example of an SAE marking. The "W" stands for Winter. The number before the W indicates the oil's fluidity at low temperatures—the smaller the number, the better the fluidity in cold conditions. The number after the W represents the oil's viscosity at 100 degrees; a higher number means the oil maintains better viscosity at high temperatures. API Marking: "SN" and "SL" are examples of API markings. The "S" stands for gasoline engines. Generally, the letter following the S indicates the oil's grade—the further the letter is in the alphabet, the higher the grade, meaning the oil performs better.
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What does the yellow circle with an exclamation mark warning light mean?

A circle with an exclamation mark in the middle indicates a warning related to the braking system, primarily signaling either a brake system malfunction or low brake fluid level. Solution: Immediate inspection and repair of the braking system are required to prevent accidents. The exclamation mark is a common fault indicator in vehicles. Apart from the circle with an exclamation mark, there are four other forms of exclamation mark warnings: a triangle with an exclamation mark, a yellow gear with an exclamation mark, a bracket with a horizontal line and an exclamation mark in the middle, and a yellow bulb with an exclamation mark. Below is a detailed analysis of these four scenarios: General Fault: A triangle with an exclamation mark indicates a malfunction in the vehicle's general performance, components, or functions. Possible issues include parking sensor failure, fuel cut-off system intervention or malfunction, external light failure, or engine oil pressure sensor malfunction. A visit to a 4S shop is necessary to diagnose and address the fault. Automatic Transmission Fault: A yellow gear with an exclamation mark is the automatic transmission fault warning light, indicating a transmission issue or low transmission fluid level. Timely replacement of transmission fluid is required. Tire Pressure Anomaly: A bracket with a horizontal line and an exclamation mark in the middle represents the tire pressure monitoring warning light. This light illuminates when the tire pressure is too low. Check the tire pressure and restore it to the normal range. Lighting Fault: A yellow bulb with an exclamation mark is the lighting fault indicator, signaling a malfunction in one of the vehicle's lights. Solution: Visit a 4S shop as soon as possible for inspection and repair. Alternatively, you can perform a self-check, focusing on commonly used bulbs such as turn signals, fog lights, and interior lighting, to identify the issue.
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What is the fuel consumption of the Dodge Challenger?

The average fuel consumption of the Dodge Challenger is around 14 liters per 100 kilometers. If driven mainly in urban areas, the fuel consumption can be even higher. Here are some specific tips on how to save fuel: 1. Try to avoid emergency braking. 2. Do not continue to press the accelerator to speed up when the engine is under high load. 3. Start in a low gear and gently press the accelerator pedal for smooth acceleration. 4. Warm up the car for about 3 minutes in winter. 5. Press the accelerator slowly when starting; pressing it too hard will only increase fuel consumption. 6. Ensure that the tire pressure is normal, as both under-inflation and over-inflation can increase fuel consumption.
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How to Delete Volkswagen Seat Memory?

Volkswagen seat memory deletion method is as follows: 1. Start the car but do not start the engine, keep the vehicle powered on. 2. Adjust the seat to the desired position. 3. Press the SET button on the seat adjustment panel. 4. Select seat memory position 1 or 2 according to the vehicle configuration and personal preference. 5. Wait for the system confirmation beep indicating successful storage. 6. Press and hold the vehicle unlock button within 5 seconds until hearing another beep, then the seat memory will be deleted and overwritten. Additional information: Seat memory function can store seat positions, which is particularly useful when multiple drivers regularly use the same vehicle (e.g., couples, employer and chauffeur). When changing drivers, the stored position can be recalled with one button press, eliminating the need for repeated adjustments.
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Is Selling a Display Car Without Disclosure Considered Fraud?

It constitutes fraud, and you can file a lawsuit to demand a return of the car and compensation. Below is relevant information: Additional Information: Article 55 of the Consumer Rights and Interests Protection Law of the People's Republic of China states that if a business operator engages in fraudulent behavior when providing goods or services, they shall, at the request of the consumer, increase compensation for the losses incurred. Car Selling: A complete second-hand car transaction procedure should include three steps: the buying and selling transaction, transfer registration, and tax and fee change registration. The general transaction process mainly includes: inspecting the car, checking for traffic violations, photocopying required documents, submitting documents, paying transaction fees, receiving transaction documents and the transaction invoice. After obtaining the second-hand car transaction invoice, the buyer can proceed with the transfer process at the transaction market using the invoice.
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Why Did the Ambient Light Suddenly Stop Working?

Ambient light suddenly not working may be due to a blown fuse, short circuit or open circuit in the power supply line, or damage to the power control module. Here are the relevant details: Introduction: Generally, ambient lights in a car can be found in positions such as the steering wheel, center console, footwell lights, cup holders, roof, welcome lights, welcome pedals, doors, trunk, and headlights. The lighting effects create a warm and cozy home-like atmosphere while also giving a sense of technology and luxury. Functions: Ambient lights enhance nighttime driving safety; they add a modern, high-tech feel to the car; they help reduce driver fatigue and promote relaxation; they create a more ceremonial and enjoyable atmosphere for in-car living; different lighting styles can improve brand recognition and highlight uniqueness; they elevate the overall premium and sporty appearance of the car.
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Introduction to the Gear Functions of the 2021 Toyota Levin

2021 Toyota Levin has a total of 5 gears. Below is a detailed introduction to the gear functions of the 2021 Levin: 1. P gear: Parking gear, used when the car needs to be parked. 2. R gear: Reverse gear, used when the car needs to reverse, pass another vehicle, or park. 3. N gear: Neutral gear, used when the car needs to coast or be towed. 4. D gear: Drive gear, the gear that controls the car's forward movement, frequently used. 5. M gear: Manual shift mode, this gear can switch the automatic transmission to manual mode, allowing gear changes via the steering wheel.
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