From DLE manual:
We recommend the use of petroleum based oil, such as Stihl HP mineral oil for breaking-in all DLE engines.

Use the break-in oil until approximately 5 gallons of fuel has been run through the engine.

The break-in oil should be added at a 32:1 ratio which requires 4 oz. of oil per gallon.

Using the break in oil will help to ensure the proper seating of the rings to the cylinder walls. This is IMPORTANT if the full potential of the

engine is to be realized.
Perhaps I should of used this. Oh well.