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What is engine oil made of?

1 Answers
Devin
07/29/25 3:38pm
Lubricating oil is generally composed of two parts: base oil and additives. The following are related introductions: 1. Lubricating base oils are mainly divided into two categories: mineral base oils and synthetic base oils. Mineral base oils are widely used and consumed in large quantities (about 95% or more), but in some applications, products made from synthetic base oils must be used, leading to the rapid development of these two types of base oils. 2. Mineral base oils are refined from crude oil. The main production processes of lubricating base oils include: atmospheric and vacuum distillation, solvent deasphalting, solvent refining, solvent dewaxing, and clay or hydrogenation supplementary refining. In 1995, China's current lubricating base oil standard was revised, mainly modifying the classification method and adding two special base oil standards for low pour point and deep refining. For the production of mineral lubricating oils, the most important factor is selecting the best crude oil. 3. Additives are the essence of modern high-grade lubricating oils. Proper selection and reasonable addition can improve their physical and chemical properties, endow the lubricating oil with new special properties, or enhance certain properties it originally had to meet higher requirements.
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More Forum Discussions

What are the benefits of waxing a vehicle?

The benefits of waxing a vehicle include: 1. Regular waxing makes it difficult for rainwater to adhere to the car's surface, preventing acid rain from corroding the paint; 2. The thin layer formed by waxing reflects light, avoiding paint aging; 3. Waxing prevents the generation of static electricity and reduces the attachment of charged dust to the car; 4. It has a polishing effect, enhancing the brightness of the paint and making the car appear newer. There are various types of car wax on the market, including solid and liquid forms, with different qualities and performances. Each type of wax has different effects and outcomes, so it is essential to choose carefully. Improper selection may not only fail to protect the vehicle but could also cause the paint to discolor.
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What does emergency lane photography mean?

Emergency lane photography refers to the monitoring of vehicles to ensure they do not occupy the emergency lane without valid reasons. The emergency lane is designated for emergency parking of vehicles encountering sudden incidents on highways. Unauthorized use of the emergency lane, if captured by cameras, will result in penalties. Emergency lanes are primarily located on both sides of highways and expressways, serving vehicles involved in engineering rescues, firefighting, medical emergencies, and official duties handling urgent matters. No vehicles are allowed to enter the emergency lane arbitrarily. When a vehicle encounters an emergency and needs to use the emergency lane, it should park within the lane, immediately turn on the hazard warning lights, and place a warning sign 150 meters behind the vehicle.
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What Causes an Automatic Transmission Vehicle to Stall While Driving?

Automatic transmission vehicles may stall while driving due to the following reasons: 1. Generator malfunction; 2. Ignition system failure; 3. Fuel system issues; 4. Air intake system problems. Typically, automatic transmissions have six gear positions: P (Park), R (Reverse), N (Neutral), D (Drive), S (Climbing gear), and L (Low gear). In the event of a stall, avoid randomly turning the steering wheel or repeatedly pressing the brakes, as both steering and braking require power assistance. After stalling, you generally only have two opportunities to apply the brakes. If there are no special circumstances ahead, you can attempt to restart the vehicle without coming to a complete stop by quickly shifting the gear lever into neutral, turning the ignition switch to the start position. Once successfully restarted, promptly shift the gear lever back to D (Drive) to continue normal operation.
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What are the reasons for the Audi A6L air conditioner not blowing air?

Here are the reasons and solutions for the Audi A6L air conditioner not blowing air: 1. Clogged air filter: The main function of the air filter is to isolate dust, particles, moisture, and other attachments in the air. It also has a strong bactericidal and deodorizing effect, ensuring that passengers do not inhale harmful gases, which could threaten their health and driving safety. The air filter is usually installed above or below the blower. Therefore, air must pass through it to enter the cabin. If the air filter is clogged, poor air circulation can cause the air conditioner to stop blowing air. Solution: During inspection, the filter can be removed to observe if the airflow increases. 2. Blower damage: If the blower is damaged, it may not draw in enough air or fail to draw air at all, preventing the air from being blown out and causing the air conditioner to stop functioning. Long-term operation of the blower can lead to dust buildup inside the fan, increasing internal friction and potentially causing the coil to overheat and fail. Another possibility is leakage or damage to the capacitor in the blower, preventing it from working properly. This issue often occurs in capacitor-start blowers. Solution: The owner needs to visit a 4S shop or repair shop for maintenance. 3. Damper, computer, or switch failure: The damper is located inside the air duct and is made of plastic, which may become stuck or break. When the damper fails to open, the air drawn in by the blower cannot flow out through the vents, resulting in the air conditioner not blowing air. The air conditioner computer is the central control unit of the air conditioning system. If it malfunctions, no operations can be performed. Solution: The owner needs to visit a 4S shop or repair shop for inspection and repair.
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How to Distinguish Between the Brake and Accelerator in a Car?

Car brake and accelerator are distinguished as follows: 1. Automatic transmission: The leftmost is the brake, and the rightmost is the accelerator. Automatic transmission models do not require manual gear shifting, as the car shifts gears automatically, so there is no clutch pedal, only the accelerator and brake, both controlled by the right foot. During driving, the left foot should not be placed on the brake pedal. 2. Manual transmission: The middle is the brake, and the rightmost is the accelerator. Manual transmission models have three pedals, from left to right: clutch pedal, brake pedal, and accelerator pedal. In manual transmission models, the left foot is only used to press the clutch pedal when shifting gears, and should not be placed on the pedal during normal driving. Both the brake and accelerator are controlled by the right foot.
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What kind of engine oil is suitable for Lavida Plus?

Lavida Plus is suitable for fully synthetic engine oil, it is recommended to use 5W-40 or 10W-40. Car fuel consumption: Generally, the car's onboard computer will display the average fuel consumption value on the dashboard, but it usually differs from the actual fuel consumption. Specific car fuel consumption can be calculated using a formula. Car fuel consumption precautions: Plan your route before driving, check the traffic conditions, and try to avoid roads prone to traffic jams. Maintain a steady speed while driving. Unstable driving speed can increase fuel consumption by about 6% in suburban areas and 2% in urban areas. Avoid carrying unnecessary items in the car to reduce vehicle weight.
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