What is the most suitable engine oil for a car?

[CatherineFitz]

Multi-grade oil is the most suitable choice for cars. Due to its cost-saving, long lifespan, and high efficiency, multi-grade oil provides excellent protection for the engine. Below is its related introduction: Introduction to multi-grade oil: Multi-grade lubricating oil is a type of lubricant with good viscosity-temperature performance, a wide operating temperature range, and significant energy-saving effects. The difference between the W viscosity grade and the 100°C kinematic viscosity grade of a multi-grade lubricating oil must be at least 15. Advantages of multi-grade oil: Extends engine life and reduces wear (minimizes wear caused by cold starts); improves fuel economy; reduces lubricating oil consumption; provides excellent low-temperature lubricity.

[MacHaley]

Having driven for over a decade, I believe engine oil selection depends on specific circumstances. Different cars have different oil requirements; for my Hyundai, the manual recommends 5W-30 viscosity, so I strictly use synthetic oil—never compromise quality to save money. In cold northern winters, this oil ensures quick starts and engine protection, while maintaining stability in summer to prevent overheating wear. I stick to reputable brands like Mobil or Shell for guaranteed quality, with each change lasting about 8,000 km. Remember, never neglect oil change intervals—check oil levels every six months or 5,000 km to prevent shortages. Experience shows that using low-quality oil accelerates engine wear, leading to costly repairs. Regularly inspect the dipstick; if the oil turns black, change it immediately—this is the secret to prolonging your car's lifespan.

[OHenry]

As a car owner who enjoys DIY maintenance, choosing engine oil should be based on your vehicle model and driving habits. First, consult the manual—it usually specifies the most suitable viscosity and type. For example, my SUV uses 0W-40 full synthetic oil, ideal for highway driving. Driving conditions matter: opt for high-temperature-resistant oil for frequent long trips, while economical mineral oil works for short city commutes—cheaper but less effective. Recommended brands include Castrol or Total. Synthetic oil may cost 20% more, but it ensures quieter engine operation and better fuel efficiency. Regular oil changes are crucial—I set reminders every 6,000 km to avoid contaminant buildup. Also, check oil certifications like API SP to ensure compatibility. Remember, DIY oil changes save money, but make sure you have the right tools and avoid making a mess in the garage.

[StJasmine]

I drive a family car and prioritize safety and simplicity. Choosing the right engine oil is key—just follow the manufacturer's recommendations. If the manual says 5W-30, stick with it and don't take unnecessary risks. With the correct viscosity, the engine runs smoothly, saving fuel and staying quiet. Most family cars use synthetic oil for better protection and fewer repair hassles. The crucial part is the oil change frequency: every 5,000 kilometers or six months, as aged oil can damage components. From my experience, trusted brands like Shell offer cost-effective solutions—even at 70,000 kilometers, the engine still feels like new. Also, consider the climate: in colder northern regions, use lower-viscosity oil for quicker starts. In short, check oil levels regularly to avoid breakdowns, saving money and ensuring peace of mind.