DA recommends 8-10 gallons of 32:1 Lawn Boy to break in a twin cylinder engine, and half that amout for a single (DA-50).

I cannot find this recommendation on their website, but it's in the sheaf of papers that's included with the engine (the manual)... I also talked to them on the phone to learn that the DA-50 would only need half as much break in fuel as the 100/150...