I did send it over syslog to graph it. This way I do not need to tell the management tool (Splunk) to collect it and what mib to use.
Same script added to all routers, no need to tell one and one that I should collect anything.
Se graphs here: http://forum.mikrotik.com/t/tool-using-splunk-to-analyse-mikrotik-logs-3-3-graphing-everything/121810/1