Johnny Kelly's side were in command in Ballycran for much of their meeting with Down.
Offaly will be bringing winning form in to the Joe McDonagh Cup final next weekend after finishing their group phase campaign with another victory.
Johnny Kelly's hurlers hit the back of the net five times against Down at McKenna Park in a game they controlled for the most part.
After Brian Duignan, Oisin Kelly, James Nally and Jack Clancy twice, all raised green flags, The Faithful County were cruising towards a big win.
A late collapse however saw Down rattle three goals in from the hurl of Daithi Sands.
The final score was 5-23 to 3-25.
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