new Float:Milleage[MAX_VEHICLES];

stock Float:GetVehicleMileage(vehicleid)
{
    new Float:pos[4];
    GetVehicleVelocity(vehicleid, pos[0], pos[1], pos[2]);
    pos[3] = floatsqroot(floatpower(floatabs(pos[0]), 2.0) + floatpower(floatabs(pos[1]), 2.0) + floatpower(floatabs(pos[2]), 2.0)) * 60.28625;
    Float:Milleage[vehicleid] += pos[3]/3600;
    return Milleage[vehicleid];
}


// Teraz przyk?adowo w OnPlayerUpdate
new string[128];
public OnPlayerUpdate(playerid)
{
     if(IsPlayerInAnyVehicle(playerid))
     {
           new vehicleid = GetPlayerVehicleID(playerid);
           format(string, sizeof(string), "Przebieg pojazdu: %f", GetVehicleMileage(vehicleid));
           SendClientMessage(playerid, -1, string);
     }
     return 1;
}