How Much Fuel Should Be Left in the Car Tank Before Refueling?
2 Answers
It is appropriate to refuel when there is a quarter of the fuel left in the car tank. If the fuel level drops below a quarter, it may affect the cooling capability of the fuel pump. The fuel consumption of a car is influenced by factors such as engine displacement, tire size specifications, and vehicle weight. According to physics principles, under unchanged conditions, the greater the weight of the car, the greater the resistance encountered during driving, leading to increased engine load and consequently higher fuel consumption. When refueling, it is not advisable to fill the tank completely. A full tank increases the vehicle's load, affects the tank's air intake, raises energy consumption, reduces the carbon canister's efficiency, and may even cause the carbon filter to fail.
I usually refuel when there's about a quarter or 15% of fuel left in the tank. After years of driving, I find this timing the most reliable because the fuel pump is cooled by the gasoline in the tank. Waiting until the fuel level is too low may cause the pump to overheat and get damaged. Moreover, some impurities tend to accumulate at the bottom of the tank, which might get sucked in when the fuel level is low, potentially clogging the system and causing bigger issues. Developing a habit of regular refueling also helps avoid the embarrassment of suddenly running out of gas, especially during long-distance drives, making it safer. I always make it a habit to check before weekends to ensure smooth travels. Additionally, gas stations are usually less crowded in the morning, saving time, and it's a good opportunity to get the car washed as well. Overall, refueling in advance is good for the car and makes life easier and more convenient for oneself.
