Is it permissible for an employee who is given the value of fuel for a government car in his possession to use the money exceeding the fuel value to repair the car itself?

The questioner : Your Eminence, in some government offices, fuel is allocated for the cars, and there is an excess in the fuel, which we use to repair the cars. I have inquired about this and contacted the person in charge, the authorized official regarding the water. He allocates, for example, two gallons, and he said: "There is no problem; buy four gallons for the price of two. Use it to buy the cheapest price." Is it permissible for me to do this, to use the fuel to repair the cars?

The Shaykh : The cars belong to the government?

The questioner : The government cars, regarding mechanics, electricity, and the like?

The Shaykh : If the officials know that this amount of fuel, or this compensation for fuel, is more than what the work requires.