
Vision uses engine oil with API quality grade: SL grade or above; SAE5W-30 (SAE10W-40 and above for tropical regions). Below is extended information about engine oil: 1. Currently, engine oils on the market can be simply divided into two types based on their base oil: mineral oil and synthetic oil (vegetable oil is not considered due to its scarcity). 2. Synthetic oils are further divided into: full synthetic and semi-synthetic, with full synthetic being the highest grade. 3. Synthetic oils have a wider temperature range, longer service life, and higher cost; for the same oil film requirements, synthetic oils can achieve this with lower viscosity, whereas mineral oils require higher viscosity compared to synthetic oils to meet the same requirements. 4. In the same working environment, synthetic oils have a much longer service life than mineral oils, hence the higher cost, but when comparing the number of oil changes, the cost is not significantly higher than that of mineral oils.

As an owner of a 2018 Vision, I've been driving this car for over two years. I strictly follow the manual's recommendation by using 5W-30 synthetic oil, with Mobil or Shell being my preferred brands. The car starts quickly in winter without worrying about lag, and maintains good fluidity in summer heat to prevent engine overheating. I change the oil every 8,000 km along with basic maintenance, which keeps the engine quiet and acceleration smooth. If budget is tight, mineral oil is acceptable but requires more frequent changes every 5,000 km to avoid carbon buildup and wear. Generally speaking, following the manual is the safest approach - don't randomly switch to other viscosities, and your car will perform well with extended longevity. Spending wisely on maintenance means you can drive on highways with confidence.

As an amateur car enthusiast, regarding the oil issue, the 1.5L engine equipped in the Vision usually suits 5W-30 synthetic oil, with moderate viscosity adapting to most climates in China. The oil flows quickly during cold starts to protect components, and won't thin out or leak under high temperatures. The advantages of synthetic oil lie in its strong anti-wear and cleaning properties, which can reduce engine carbon buildup and improve fuel efficiency. I've used mineral oil for comparison, and the effect was inferior, especially in urban congested areas. The replacement interval is recommended to be around 7,500 kilometers, with the oil grade selected as API SN standard. Don't forget to check the dipstick and color; normal oil should be amber and not cloudy. Small details can avoid major repair troubles.

I prioritize affordability when driving my car. For daily commuting in my 2018 Vision, I use 5W-30 mineral oil that meets OEM standards at just fifty yuan per bottle—much cheaper than synthetic oil. I get it changed at a small shop every 5,000 kilometers, making sure to avoid off-brand products for basic protection. During summer heat, I just check that the oil level isn't too low. Long-term use like this has caused no engine issues while keeping costs low. Frequent drivers should budget carefully—no need to waste money on premium oils. Stick to the manual's recommended viscosity and keep it simple.

To protect the car engine, I insisted on using fully synthetic 5W-30 oil for my 2018 Vision, which effectively lubricates metal parts, extends engine life, and reduces noise. Changing it every 100,000 kilometers makes it more durable and cost-effective in the long run compared to mineral oil. It ensures worry-free cold starts and adequate thermal protection. I recommend sticking to a single brand like Castrol or Tongyi to avoid performance issues from mixing. Regular maintenance combined with oil checks keeps the car in good condition for long-distance driving with peace of mind. The core of healthy maintenance is preventing wear and tear.

I often discuss experiences in the car enthusiast circle. The 18th-generation Geely Vision uses 5W-30 synthetic oil, which offers strong adaptability—quick cold starts in the north and moderate performance in southern temperatures. Brands like Great Wall or Shell provide stable quality. It's recommended to change the oil according to the manual's schedule to avoid delays that could affect fuel consumption. Through discussions, I've found some people use 10W-40, but it's not suitable for all environments. Using higher-quality oil slightly improves fuel efficiency and reduces emissions. Let's share more insights—choosing the right oil makes driving smoother and maintenance hassle-free.


