What are the safe capacity and actual capacity of a fuel tank?
2 Answers
The rated volume stated in the vehicle's user manual is the safe capacity, and it is normal for the actual capacity to be 10% larger than the rated volume. There are three methods to reduce fuel consumption in vehicles: Minimize the vehicle's weight: Keep the interior as simple as possible and avoid carrying unnecessary items, as every additional kilogram of load increases fuel consumption by 1%; Avoid excessive modifications: Adding spoilers, protective covers, or wings can disrupt the original aerodynamic design of the vehicle, increasing wind resistance and consuming extra fuel. Modifying lighting systems can also increase electrical load, leading to unnecessary fuel consumption; Develop good driving habits: Avoid sudden acceleration, driving at high speeds in low gears, prolonged idling, frequent lane changes or braking. Instead, aim for smooth starts, steady-speed driving, and reduced braking.
I used to think that filling the tank to the brim was the standard capacity. However, once during a summer business trip, I filled the tank completely, and the heat caused the fuel to seep out, dirtying the engine. Later, I learned that the safe capacity is usually about 10% less than the actual capacity. For example, a tank with an actual capacity of 55 liters has a safe capacity of about 49 to 50 liters. This design leaves room for expansion. The safe capacity is to prevent leaks or even safety hazards caused by thermal expansion and contraction, while the actual capacity is the maximum fuel volume claimed by the manufacturer. Now, I only fill up to the safe line, which saves me a lot of trouble and protects the vehicle. I recommend other car owners pay attention to this and not overlook safety for the sake of carrying a little extra fuel.
