When is the Best Time to Refuel a Car Based on Remaining Gasoline?
2 Answers
It is advisable to refuel when the car has about 1/4 of its gasoline left. When the yellow warning light comes on, it indicates that there is only a small amount of fuel remaining in the tank, and you should refuel as soon as possible. Ideally, you should refuel before the yellow light illuminates. It is essential to maintain an adequate amount of gasoline in the engine. Avoid waiting until the yellow light comes on to refuel. The engine's fuel system includes a fuel supply device, commonly known as the fuel pump, which requires proper cooling. The cooling medium for the fuel pump is the gasoline itself. If the gasoline level is too low, the fuel pump may not cool sufficiently, leading to potential damage. Therefore, most drivers today avoid waiting until the yellow light appears to refuel. Generally, when the fuel level drops below 1/4, it is time to refuel. Precautions for refueling: Avoid filling the tank to the brim or until the pump automatically stops ("jump gun"). Doing so in summer can be dangerous, as gasoline expands due to thermal expansion and contraction, potentially causing overflow. Additionally, overfilling can damage the carbon canister. Excess gasoline may flow into the carbon canister along with fuel vapors, leading to damage. A damaged carbon canister cannot filter fuel vapors properly, allowing gasoline to enter the vehicle's interior, which poses a significant safety risk.
I used to wait until the fuel gauge was almost empty before refueling, but one time my car stalled and had to be towed to the repair shop, costing me hundreds to fix the fuel pump. The mechanic explained that gasoline is used to cool the fuel pump, and when the fuel level is too low, the pump overheats and is prone to damage. Now I've developed the habit of refueling when the tank is between one-quarter and one-eighth full. This keeps the fuel pump submerged in gasoline, maintaining a stable temperature and extending its lifespan. Sediment or rust at the bottom of the tank can be drawn into the system when fuel levels are low, potentially causing clogs. I usually refuel during my weekend commute—it's convenient, saves effort, and helps avoid unexpected breakdowns. My new car has been running great for two to three years, and my friends have started adopting this maintenance practice too.
