What is the optimal amount of fuel to add?

[AdrielRose]

Fueling up to 80% is sufficient. Below are the explanations for the ideal refueling timing and reasons, as well as why only 80% should be added: Refueling timing and reasons: The 25% threshold refers to the ideal refueling timing, meaning that when the fuel level drops to 1/4 of the tank capacity, it's time to refuel. Waiting until the tank is nearly empty can cause accumulated impurities at the bottom of the tank to be drawn into the fuel system, leading to poor fuel delivery. Additionally, when the tank is too empty, it tends to contain air, which can form condensation due to large day-night temperature differences. This moisture can mix with the fuel, resulting in incomplete combustion. Reasons for only adding 80%: For short-distance city driving, there's no need to fill the tank completely, as this would increase the vehicle's load and lead to unnecessary fuel consumption. Therefore, fueling up to 80% is sufficient.

[MacLucas]

I've been driving for over a decade, and the best practice I recommend is filling up until the pump automatically clicks off, meaning it stops when full. This way, a full tank can last you four to five hundred kilometers, saving you the hassle of frequent gas station visits. If you only add a little, say a hundred bucks' worth, not only will you have to queue up again in less than two days, but it also harms your car. That's because there's a fuel pump at the bottom of the tank that relies on fuel for cooling and lubrication. If the fuel level is too low, the pump gets exposed to air and can burn out, costing hundreds to repair. Plus, filling up when the tank is empty can suck in debris, clogging the filter. A full tank adds a few dozen kilograms to the car's weight, but normal driving won't affect fuel consumption. In fact, frequently driving with low fuel levels makes the car consume more fuel. When filling up, don't force it to the brim—leave some space for vapor recovery, which is safer and more eco-friendly. Make it a habit to fill up until the pump clicks off; your car will last longer and save you money.

[Jocelyn]

As a car enthusiast, I recommend filling up the tank until the automatic nozzle shuts off each time. The fuel tank design includes a fuel float and charcoal canister system - keeping it full protects the fuel pump by keeping it immersed in fuel to prevent overheating damage and extend its lifespan. If you only fill halfway, frequent refueling increases pump wear and raises the risk of costly repairs. The slight weight savings from partial fills has minimal impact on fuel economy since modern engines can self-adjust. Additionally, full tanks reduce gas station trips, making it more eco-friendly by lowering carbon emissions. Just remember not to overfill to the point of spillage or air pollution. Practical full fills provide peace of mind while protecting overall vehicle performance - checking fuel levels during regular maintenance helps prevent surprises.

[LaEmiliano]

When I first got my driver's license, I always struggled with how much fuel to add. Later, I found that filling up the tank is the most reliable method. Every time I go to the gas station, I fill it up until it automatically stops, and a full tank lasts about a week without needing to worry about refueling again. Adding just 100 or 200 yuan worth of fuel doesn't last long before the fuel gauge drops low, which can easily lead to stalling and damage the fuel pump. Although the weight increases by about ten kilograms, it doesn't significantly affect fuel consumption and makes driving more stable. Just don't overfill it to the point of forcing it, as that risks fuel leakage. Simply filling it until the pump clicks saves time and protects the car.