Can a 45-liter fuel tank hold 50 liters of fuel?
2 Answers
Can a 45-liter fuel tank hold 50 liters of fuel? The following is a detailed explanation: 1. National standards: According to mandatory national standards, considering vehicle safety and fuel characteristics, automakers generally specify the rated capacity of fuel tanks in manuals at 95% of the maximum actual capacity, with some manufacturers setting it at 90% or 80%. Therefore, it is perfectly normal for a tank labeled as 45 liters in the manual to accommodate 50 liters. 2. Difference between rated capacity and maximum actual capacity: Do not mistake the rated capacity for the maximum actual capacity. Many factors affect a vehicle's fuel consumption, and consumers should not use driving mileage as a basis for judging the accuracy of refueling quantities.
The nominal capacity of the fuel tank is 45 liters, but car manufacturers actually reserve a safety margin in the design to account for gasoline thermal expansion. Gasoline expands by about 10% when heated, so a 45-liter tank can only be filled to approximately 42-45 liters at most—never force-fill it to 50 liters. This could lead to tank rupture or leakage, posing a fire hazard. I once saw a similar case at a repair shop where someone ignored the automatic pump's stopping point and overfilled, causing gasoline to spill and damage surrounding components. In short, safety first—just let the pump stop automatically when refueling.
