Engine oil is the "blood" of the engine, responsible for important functions such as lubrication, cleaning, cooling, and rust prevention. Choosing the right engine oil can not only extend engine life, but also improve fuel economy and driving experience. This guide will help you understand how to choose the right oil for your car.

1、 Understand the basic classification of engine oil

Mineral engine oil:

Directly extracted from crude oil

Low price, but limited performance and lifespan

Suitable for old car models or low mileage use

Semi synthetic engine oil:

Mixture of mineral oil and synthetic oil

High cost-effectiveness, better performance than mineral oil

Suitable for most daily driving situations

Fully synthetic engine oil:

Manufacturing through chemical synthesis process

Excellent performance, strong resistance to high and low temperatures

Suitable for high-performance cars, turbocharged engines, or extreme weather conditions

2、 Interpretation of oil grade

Oil grades such as "5W-30" contain important information:

Viscosity grade (number before W):

Indicating low-temperature fluidity (such as 5W)

The smaller the number, the better the low-temperature start-up performance

High temperature viscosity (number after W):

Indicating the protective ability under high temperature (such as 30)

The larger the number, the better the high-temperature protection

Common label selection:

Cold regions: 0W-20 or 5W-30

Warm regions: 10W-30 or 10W-40

High performance car: 5W-40 or 0W-40

3、 Consider API quality level

API (American Petroleum Institute) standards indicate the quality of engine oil:

Gasoline engine: starting with "S" (such as SN, SP)

Diesel engine: starting with "C" (such as CK-4)

The latest standards usually provide better protection and performance

4、 Special needs considerations

High mileage vehicles (>75000 kilometers):

Choose engine oil specifically designed for high mileage

Contains additional sealing modifiers and anti-wear additives

Turbocharged engine:

Suggest using fully synthetic engine oil

Choose a model with good high-temperature stability

Start stop system vehicles:

Choose a low friction formula

Consider special certified engine oil

5、 Other key points for purchasing

Refer to the vehicle manual:

Follow the manufacturer's recommended oil type and replacement cycle

Pay attention to special certification requirements (such as ACEA standards required for certain European cars)

Driving habits and environment:

Frequent short distance driving: Consider replacing more frequently

Extreme temperature: Select the corresponding label

Overload or drag: choose higher viscosity

Brand selection:

Choose a well-known brand to ensure quality

Pay attention to identifying authenticity and avoid counterfeit products

6、 Suggested replacement cycle

Mineral oil: approximately 5000 kilometers/6 months

Semi synthetic oil: about 7500 kilometers/9 months

Fully synthetic oil: approximately 10000-15000 kilometers/12 months

Attention: The actual replacement interval should be adjusted according to driving conditions and vehicle conditions.

7、 Common Misconceptions

Misconception: The more expensive the engine oil, the better

Fact: What is suitable is the best, there is no need to excessively pursue high-end

Misconception: The higher the viscosity, the better the protection

Fact: Excessive viscosity can increase fuel consumption and start-up wear

Misconception: You can mix different brands of engine oil at will

Fact: Different formulations may cause adverse reactions

conclusion

Choosing the appropriate engine oil requires comprehensive consideration of vehicle type, usage environment, and driving habits. It is equally important to regularly change the engine oil and maintain the appropriate oil level. When unsure, consulting a professional technician or referring to the vehicle manual is the safest option. The correct oil selection and maintenance habits will provide the best protection for your car, ensuring the long-term healthy operation of the engine.