CMD:refuel(playerid, params[])
{
    if(IsPlayerInAnyVehicle(playerid) && GetPlayerState(playerid) == PLAYER_STATE_DRIVER)
	{
	    new vehicleid = GetPlayerVehicleID(playerid);
	    new engine,lights,alarm,doors,bonnet,boot,objective;
    	GetVehicleParamsEx(vehicleid,engine,lights,alarm,doors,bonnet,boot,objective);
	    if(engine == VEHICLE_PARAMS_ON) return SendClientMessageEx(playerid, COLOR_RED, "You need to shut off the engine before filling up (/car engine).");
	    if(!IsAtFuelStation(playerid)) return SendClientMessageEx(playerid, COLOR_RED, "You're not at a gas station.");
	    if(GetVehicleModel(vehicleid) == 481 || GetVehicleModel(vehicleid) == 509 || GetVehicleModel(vehicleid) == 510) return SendClientMessageEx(playerid,COLOR_RED,"This vehicle doesn't need fuel.");
	    if(VehicleFuel[vehicleid] >= 100.0) return SendClientMessageEx(playerid, COLOR_RED, "This vehicle's tank is already full.");
	    if(RefuelingVehicle[playerid] == 1) return SendClientMessageEx(playerid, COLOR_RED, "You are refilling your vehicle's tank.");
       	SendClientMessageEx(playerid, COLOR_WHITE, "Refueling your vehicle's tank, please wait.");
       	RefuelingVehicle[playerid] = 1;
       	RefuelingVehicleTimer[playerid] = SetTimerEx("ReFill", 1000, true, "i", playerid);
	}
	return 1;
}

stock StopRefueling(playerid)
{
	GivePlayerCash(playerid, -100);
  	SendFormattedMessage(playerid, COLOR_WHITE,"Your vehicle's tank has been refilled for $100.");

forward ReFill(playerid);
public ReFill(playerid)
{
	if(!IsAtFuelStation(playerid) || !IsPlayerInAnyVehicle(playerid) || VehicleFuel[GetPlayerVehicleID(playerid)] >= 100.0 || GetPlayerCash(playerid) < 1)
	{
		StopRefueling(playerid);
	}
	else
	{
	    new engine,lights,alarm,doors,bonnet,boot,objective;
    	GetVehicleParamsEx(GetPlayerVehicleID(playerid),engine,lights,alarm,doors,bonnet,boot,objective);
		if(engine == VEHICLE_PARAMS_ON) return StopRefueling(playerid);
		VehicleFuel[GetPlayerVehicleID(playerid)] += 1.0; RefuelingVehiclePrice[playerid] += 30;
		if(VehicleFuel[GetPlayerVehicleID(playerid)] >= 100.0) VehicleFuel[GetPlayerVehicleID(playerid)] = 100.0;
	}
	return true;
}

KillTimer(RefuelingVehicleTimer[playerid]);