Engine break in/inverted op check

[Capfl424]

Just installed an overhauled engine and a new inverted system. Have about 20 hours on it and the oil consumption has been virtually zero since the install. Did an oil change at 10 hours, about to do another one. Want to op check the inverted system in flight. My mechanic is vague on how long to wait. Still running mineral oil. Any thoughts?

Engine is an 0435-a.

 

[cwilliamrose]

 

[StinsonPilot]

 

[cgzro]

 

[acroeric]

 

[Capfl424]