public UpdateSpeed(){          
new Float:x,Float:y,Float:z;
new Float:distance,value,string[256];
for(new i=0; i<SLOTS; i++){
if(IsPlayerConnected(i) && IsPlayerInAnyVehicle(i)){
GetPlayerPos(i, x, y, z);
distance = floatsqroot(floatpower(floatabs(floatsub(x,SavePlayerPos[i][LastX])),2)+floatpower(floatabs(floatsub(y,SavePlayerPos[i][LastY])),2)+floatpower(floatabs(floatsub(z,SavePlayerPos[i][LastZ])),2));
    // Distance: meters in the last second
value = floatround(distance * 3600);
if(UpdateSeconds > 1){
value = floatround(value / UpdateSeconds);
}
// meters an hour
if(SpeedMode){
format(string,sizeof(string),"            ~y~%dMPH",floatround(value/1600));

}
else{
format(string,sizeof(string),"           ~y~%dKM/H",floatround(value/1000));

}
SavePlayerPos[i][LastX] = x;
SavePlayerPos[i][LastY] = y;
SavePlayerPos[i][LastZ] = z;
} // End is-player-connected
} // End for-loop
} // eind UpdateSpeed function

new SpeedTimer;

///////////////////////////////////////////////////////////////////////////////////////////////////

public CheckFuel(playerid)
{
new Ptmess[32];
new Float:distance,value,string[256];

value = floatround(distance * 3600);
for(new i=0;i<MAX_PLAYERS;i++)
 {
  if(IsPlayerConnected(i) == 1 && IsPlayerInAnyVehicle(i) == 1)
   {
   if(GetPlayerState(i) == 2)
    {
	 new Vi;
     Vi = GetPlayerVehicleID(i);
     Petrol[Vi]--;

     if(Petrol[Vi] >= 1)
      {
      format(Ptmess, sizeof(Ptmess),"~y~%d %", Petrol[Vi]);
	  format(string, sizeof(string), "~y~%d%  %dKM/H", Petrol[Vi],floatround(value/1000));
      GameTextForPlayer(i, string,10000,6);
	  }
      else
      {
      RemovePlayerFromVehicle(i);
      SendClientMessage(i, COLOR_RED, "Your vehicle ran out of petrol");
      if(Petrol[Vi] < 0)
	   {
	   Petrol[Vi] = 0;
	   }
      }

      if(Petrol[i] >= 51)
       {
       format(Ptmess, sizeof(Ptmess),"~y~%d %", Petrol[Vi]);
	   format(string, sizeof(string), "~y~%d% %dKM/H", Petrol[Vi],floatround(value/1000));
       GameTextForPlayer(i, string,10000,6);
	   }

	 }
    }
 }
}