How many kilograms is 30 liters of 92-octane gasoline equal to?
2 Answers
One liter of 92-octane gasoline is approximately 0.727 kilograms, so the weight of 30 liters of 92-octane gasoline is: 30 × 0.727 = 21.81 kg, which is 21.81 kilograms. Gasoline appears as a transparent liquid, is flammable, and has a distillation range of 30°C to 220°C. Its main components are C5–C12 aliphatic hydrocarbons and cycloalkanes, along with a certain amount of aromatic hydrocarbons. Gasoline has a high octane rating (anti-knock combustion performance) and is classified into different grades based on octane ratings, such as 89, 90, 92, 93, 95, 97, and 98. Starting from January 2012, the gasoline grades 90, 93, and 97 were revised to 89, 92, and 95, respectively. The calorific value of gasoline is approximately 44,000 kJ/kg (the calorific value of a fuel refers to the amount of heat produced when 1 kg of fuel is completely burned). The weights of one liter of 90#, 93#, and 97# gasoline are 0.72 kg, 0.725 kg, and 0.737 kg, respectively. Due to seasonal climate variations, the density of gasoline may slightly change. Different grades of gasoline also have different densities: 90-octane gasoline has a density of 0.72 g/ml; 93-octane gasoline has a density of 0.725 g/ml; and 97-octane gasoline has a density of 0.737 g/ml.
When it comes to calculating gasoline weight, I often deal with this during car repairs. Thirty liters of 92-octane gasoline weigh approximately 22.5 kilograms, as the average density of gasoline is 0.75 kilograms per liter. The calculation is straightforward: volume multiplied by density—30 times 0.75 equals 22.5. However, density is not absolute; it is affected by temperature. In winter, when temperatures are low, the density slightly increases to 0.77 kilograms, raising the weight to 23.1 kilograms, while in summer, high temperatures reduce the density to 0.73, decreasing the weight to 21.9 kilograms. The 92-octane rating refers to the gasoline's anti-knock properties, not its density, so the calculation remains unchanged. This knowledge is useful, such as when filling up the fuel tank, as the increased vehicle weight affects fuel consumption and handling. For example, if you drive a small car with passengers and add 30 liters of gasoline, the total load increases by several dozen kilograms, noticeably slowing acceleration. It’s advisable to manage fuel levels carefully and avoid overfilling to prevent waste. In car maintenance, density values can help estimate fuel cost efficiency.
