How Much Fuel Should Be Added for Optimal Vehicle Performance?

[LeviAnn]

Automobile fuel tank rated capacity should be controlled at 95% of the maximum safe capacity. Below is relevant information about vehicle refueling: 1. Maximum and reasonable fuel tank capacity: Generally, the capacity marked on ordinary fuel tanks is not the maximum volume but the maximum reasonable volume. For example, if a fuel tank is marked as 60L, it may actually hold around 70L when completely filled. Adding 60L represents a reasonable range that provides sufficient space for fuel expansion caused by temperature increases, thereby ensuring fuel tank safety during usage. 2. Safe fuel tank standards: Since refueling quantity cannot be determined based on the tank's rated capacity (automobile fuel tanks are containers, not measuring instruments), they cannot serve as verification of measurement accuracy. According to mandatory national standards, the rated capacity of automobile fuel tanks should be maintained at 95% of their maximum safe capacity.

[MacAmy]

I've been thinking about refueling. Filling up half a tank is particularly beneficial for the car because less fuel means the overall weight of the vehicle is lighter, reducing the engine's burden and naturally lowering fuel consumption. For short commutes, I only fill up to 60% capacity, and it feels like the car starts more agilely, saving quite a bit on fuel costs. Don't fill up too much, especially in hot weather when gasoline expands, which can lead to waste and possible overflow pollution; also, don't run the tank dry, as the fuel pump can overheat and become prone to damage. Keeping the fuel level between a quarter and three-quarters is ideal—this simple habit protects the car and saves hassle.

[ElizabethRose]

From a maintenance perspective, adding a moderate amount of fuel is better for the car, avoiding filling the tank completely or running on empty. A full tank increases pressure, which can easily cause fuel leaks or wasteful gasoline evaporation; an empty tank can make the fuel pump overheat, shortening its lifespan. I've often seen cars damaged due to low fuel levels, so I recommend refueling when there's about 10% left. This also helps prevent sediment buildup in the tank. Normally, filling up to about 80% capacity reduces weight and protects key components.

[StAniyah]

To save money, I believe adding a moderate amount of fuel, such as half a tank, is the most cost-effective. A lighter car means lower fuel consumption, naturally saving money; adding too little requires frequent trips to the gas station, wasting time and fuel; filling up completely increases the engine's burden. Personally, I prefer adding 30-40 liters, aligning with gas station discount cycles, to avoid extremes. Simply put, finding the balance point is both convenient for the car and economical.