How long can a car with ethanol-blended gasoline be left unused?

[StKayden]

Adding ethanol-blended gasoline allows a car to be left unused for 15 to 25 days. Relevant details are as follows: Specific details: A car using ethanol-blended gasoline can be parked for about a month. If the car is left unused for too long, the alcohol in the gasoline will evaporate, leading to stratification or deterioration of the gasoline, which will affect the normal operation of the car's engine. Delaying deterioration period: Add a water remover before long-term parking. The water remover can effectively reduce the moisture content in the fuel tank, making it less prone to deterioration. If oil-water separation is detected, the only solution is to clean the fuel tank and fuel lines directly.