Hail!
ECL 8 ?? Dragon errata too? (like hobgoblin)?
I am not with my DMG with me, but IIRC it would be 5,
(I vaguely remember a DMG quote about Ogres in 5th level parties, and 8th level parties with a minotaur or an ogre with 3 additional class levels...)
I am also not with my MM, but the SRD...