How Many Kilograms is One Liter of Gasoline?
4 Answers
According to the mass density formula m=ρV, the weight of one liter of gasoline can be calculated. 1. The average density of 90-octane gasoline is 0.72g/ml; thus, the weight of one liter of 90-octane gasoline is 0.72 kilograms. 2. The density of 93-octane gasoline is 0.725g/ml; therefore, the weight of one liter of 93-octane gasoline is 0.725 kilograms. 3. The density of 97-octane gasoline is 0.737g/ml; hence, the weight of one liter of 97-octane gasoline is 0.737 kilograms. Note: Occasionally mixing different grades of gasoline once or twice is not a problem. However, long-term mixing is not recommended because different gasoline grades have different compression ratios. Vehicles are calibrated at the factory based on the compression ratio of the specified gasoline type. If the gasoline type is changed abruptly, the mismatch between the compression ratio and the calibration can adversely affect the car's engine, ignition system, and fuel injectors. Therefore, never change the gasoline grade arbitrarily, as it may cause serious damage to your beloved vehicle.
I remember driving for so many years, and every time I refuel, I'm curious about how much a liter of gasoline actually weighs. Generally, it averages around 0.75 kilograms, but the exact weight depends on the situation: gasoline becomes lighter when the temperature rises and heavier when it drops, usually fluctuating between 0.74 and 0.78 kilograms. When refueling, I pay more attention to volume because the price is calculated per liter, but weight becomes important when calculating fuel consumption. For example, on long trips, a full tank is like carrying an extra person's weight, which slightly increases fuel consumption. This has made me develop the habit of checking for fuel leaks or avoiding off-brand gasoline, as low-density fuels often burn faster and aren't cost-effective. The key is to choose reputable gas stations and maintain the car regularly to ensure the fuel system runs smoothly.
Having worked in the repair shop for over a decade, I can say that gasoline density isn't constant. On average, one liter weighs about 0.75 kilograms, ranging from 0.74 to 0.78 kg. When temperature changes, the spacing between oil molecules expands or contracts, altering density and affecting engine combustion efficiency. If the fuel is too light, it indicates higher evaporation and fewer impurities, potentially igniting faster but leaving incomplete emissions; heavier fuel burns slower but with less smoke. I advise car owners to regularly test fuel quality, especially during hot seasons—avoid keeping the tank empty too long to prevent gasoline evaporation waste. During repairs, checking density parameters can help identify whether inferior fuel or other additives caused malfunctions.
I always carefully calculate fuel costs, with one liter of gasoline weighing about 0.75 kg. For short city trips, it's not noticeable, but for long-distance travel, I have to consider the total weight of the fuel tank—a 60-liter tank adds around 45 kg. In summer, when it's hot, the fuel is slightly lighter at about 0.74 kg, possibly due to more evaporation, which increases costs. In cold weather, it's heavier at 0.78 kg and burns more steadily. This influences my choice of refueling time, avoiding high temperatures to save some fuel. Understanding density also helps me avoid cheaper fuel, which often contains water or impurities, making it lighter and less cost-effective. Money-saving rule: Pay by the liter, as weight just helps understand the actual burden.
