Why does the Civic fill up after adding 37 liters to the 47-liter tank?
4 Answers
The reason the Civic fills up after adding 37 liters to the 47-liter tank is that there is usually about 10 liters of engine oil remaining in the car when the system prompts the need to refuel. Therefore, only 37 liters are needed to fill the tank. Below is a detailed introduction about engine oil: 1. Overview: Engine oil, also known as engine lubricant, has an English name of Engine-oil. Its density is approximately 0.91×10³ (kg/m³). It serves to lubricate and reduce friction, assist in cooling, seal against leaks, prevent rust and corrosion, and provide shock absorption for the engine. 2. Composition: Engine oil consists of two parts: base oil and additives. The base oil is the main component of lubricating oil, determining its basic properties. Additives can compensate for and improve the shortcomings of the base oil's performance, granting it new characteristics, making them an important part of lubricating oil.
As someone who frequently tinkers with cars, I've found that the reason a Civic's fuel tank is labeled 47 liters but only fills up to 37 liters is mainly related to its tank design. Car fuel tanks typically have a reserved safety space to prevent fuel from overflowing during thermal expansion or leaking when parked on slopes. This model might have around 10 liters reserved. Additionally, the fuel gauge and sensors may be set conservatively—when you refuel, the dial shows full, but the actual fuel level hasn't reached maximum capacity. I recommend not filling up too aggressively to let the system self-calibrate and avoid damaging the fuel pump or filtration system. If this happens often, check the vehicle manual or visit a dealership to adjust the sensors.
I have been driving a Civic on long-distance trips for many years and have often encountered situations where the fuel tank only takes 37 liters to fill up. This is usually caused by an inaccurate fuel gauge or impurities settling at the bottom of the tank, occupying space. In older vehicles, aging fuel pumps and sensors can lead to reading deviations, where the actual fuel level is not full but the gauge shows it as full. Driving habits also play a role, such as always refueling at low levels, causing delayed gauge calibration. I make it a habit to perform regular maintenance and clean the fuel tank to prevent blockages. For safety, avoid refueling on slopes to prevent misjudgment.
Many Civic owners have reported the issue of the fuel tank being full after adding only 37 liters during car repairs. The internal tank may be deformed or have accumulated sludge, which over time reduces the available space. This is especially common in humid areas where corrosion and deposits tend to build up. It's advisable to inspect the fuel pump and ventilation system, and professional cleaning may be required if abnormalities are found. Additionally, a clogged fuel filter can also cause difficulties during refueling. It is recommended to perform tank maintenance every two years.
