Something

dcmd_givefuel(playerid, params[])
{
    #pragma unused params
	new vid=GetPlayerVehicleID(playerid);
	if(gTeam[playerid]==TEAM_MECHANIC){
	if(IsPlayerInAnyVehicle(playerid)){
	if(UsedCommand[playerid]==0){
	UsedCommand[playerid]=1;
	SetTimer("UsingCommand",15000,0);
        PeopleFueled[playerid]++;
	Gas[vid]+=10;
	   }else{
	  SendClientMessage(playerid,COLOR_RED,"You have to wait 15 seconds before adding fuel");
		}
         }else{
           SendClientMessage(playerid,COLOR_RED,"You must be in a vehicle to do that");
    	   }
    }else{
	SendClientMessage(playerid,COLOR_SYSTEM,"You need to be a mechanic to do that");
    }
    return 1;
}