[Necip]

You can set a variable which when a vehicle spawns it will set the fuel to 100. Something like this:

pawn Код:

new Float: VehicleFuel[MAX_VEHICLES] = 100.0;

And under OnGameModeInit:

pawn Код:

for(new v = 0; v < MAX_VEHICLES; v++)
    {
        VehicleFuel[v] = 100.0;
    }

Just giving example.