What is the appropriate fuel level to maintain in summer?

[London]

In fact, there is no standard for how much fuel is appropriate to fill in a car's fuel tank during summer. It is just that when temperatures are high, gasoline stored in the fuel tank for too long can easily produce gum and sediment, which may clog the fuel injectors and cause the engine to operate abnormally. Below are specific methods for choosing engine oil: Performance selection: If you prioritize the long-term effectiveness of the oil, you can choose Mobil oil; if you focus on the oil's cleaning ability for the engine, you can use Shell lubricants; for oils requiring strong oil film toughness, Castrol is recommended. Driving conditions: For frequent driving in congested areas, older vehicles, or long-distance heavy-load transportation, the viscosity of the lubricating oil can be appropriately increased. Engine type: For naturally aspirated engines, mineral oil and semi-synthetic oil can be used. Compared to naturally aspirated engines, turbocharged engines have a more compact structure and operate under harsher conditions, requiring higher-grade lubricating oils with better fluidity, preferably full synthetic oil.