One liter of gasoline is about 1.5 kg, but the volume of one liter of gasoline is also changing due to thermal expansion and contraction, but no matter how the volume of one liter of gasoline changes, it is about 1.5 kg.

There is a formula in physics that the weight is equal to the density multiplied by the volume, and the weight of gasoline can also be calculated by this formula. For example, the density of No.92 gasoline is about 0.725g/ml, which is about 1.45 kg after calculation by physical formula.

The density of each gasoline is different. For example, the densities of No.92 gasoline, No.95 gasoline and No.98 gasoline are different, so their calculated weights are definitely different, but the difference is not too big, just very small. Temperature also affects the density of gasoline. As the temperature increases, the density will decrease, and as the temperature decreases, the density will increase.