Will the Pump Automatically Stop When the Tank is Full?
2 Answers
Nowadays, gas stations commonly use self-sealing nozzles that automatically shut off when the tank is full. Below are specific methods for selecting engine oil for your car: Performance selection: If you prioritize long-lasting oil, you can choose Mobil oil; if you focus on engine cleanliness, Shell lubricants can be used; for lubricants with strong oil film toughness, Castrol is recommended. Driving conditions: For frequent driving in congested areas, older vehicles, or long-distance heavy-load transportation, the viscosity of the lubricant can be appropriately increased. Engine type: For naturally aspirated engines, mineral oil or semi-synthetic oil can be used. Compared to naturally aspirated engines, turbocharged engines have a more compact structure and operate under harsher conditions, requiring higher-quality lubricants with better fluidity, preferably full synthetic oil.
When I refuel, I always notice the pump nozzle can stop automatically, thanks to its clever design. When the tank is nearly full, fuel rushes into the small hole in the nozzle tip, blocking the airflow and creating a vacuum change. The internal spring mechanism then triggers an immediate cut-off of the fuel flow. This mechanism operates based on Bernoulli's principle and is highly reliable, preventing spills and waste caused by manual estimation. Occasionally, if the nozzle is tilted or the fuel hole is clogged, it might not stop in time. I recommend keeping the nozzle vertical and steady to minimize errors. Modern gas stations are almost universally equipped with this system, protecting the environment and preventing fires. It's a testament to engineers' ingenuity, incredibly convenient for daily use, and rarely fails when operated correctly.
