How many kilograms of gasoline fill a 12.5-gal gas tank?
The density of gasoline ranges from 0.71–0.77 kg/L taking an average of 0.74... 12.5 US gal = 47.3 L (imperial would be different) 47.3 L x 0.74 kg/L = 35 kg
It could be anything from 33.6 kg up to 36.4 kg, average is 35 kg. This depends on the temperature, grade and brand of gasoline.
680 Density (kg/m3) (6.30 lb/US gal) 2.858 kg (kilograms)/US gal 35.725 kg of gasoline fill a12.5-gal das tank
77.5Lbs / .35.1 kgs