Is 40 or 30 engine oil better for Haval F7?
2 Answers
Haval F7 is better with 40 engine oil, as 40 oil is more viscous than 30 oil. Introduction to engine oil: Engine oil consists of base oil and additives. The base oil is the main component of lubricating oil, determining its basic properties. Additives can compensate for and improve the deficiencies in the performance of the base oil, giving it certain new properties, making them an important part of lubricating oil. Selection of engine oil viscosity: It should meet both low-temperature startability and high-temperature lubricity. Choose the viscosity grade according to the region, season, and temperature, and try to use multi-grade oil. In winter in extremely cold areas, engine oil with OW, 5W, or OW/20 or 5W/20 multi-grade oil should be selected. In summer in hot areas, 40 engine oil or 20W/40 engine oil should be used.
When driving a Haval F7, choosing between 30 or 40 viscosity engine oil depends on specific usage conditions. If you mainly commute in the city, 30 viscosity is more suitable—it ensures quick starts, lower fuel consumption, and smoother engine operation during traffic jams. However, if you frequently drive long distances or in mountainous areas, 40 viscosity provides extra protection on highways and steep slopes, making the engine sound more stable. The Haval manufacturer's manual typically recommends types like 5W-30, which have good low-temperature fluidity, especially in cold northern winters to avoid difficulty starting in traffic. Personally, I tried switching to 40 in summer and felt better stability under high temperatures; I switched back to 30 in winter for better fuel efficiency. Remember, randomly choosing oil may harm the engine or waste fuel—it's best to follow the manual or consult a professional mechanic for confirmation.
