So I now have 5 hours on my rebuilt IO-540. This follows an hour on Barretts test cell going through various power settings. So guess that means there's 6 hours on the engine.
For break-in I have been following the Lycoming's Service Instruction. 95% of the 5 hours was spent at 3,500 - 4,500ft with power settings between 65% and 75%.
After initial service I had about 9.5 quarts in it. After an hour of operations I had about 9.25 quarts in it so I put another quart in. After another 2 hours it was about 9.25 again. Seeing that the oil I put in was now relocated on the belly of the aircraft I left it at 9.25. After another few hours it's still at 9.25. So either it's not burning any oil or the amount is so minuscule that I can't notice it on the dip stick.
Per the Service Instruction "For correct piston ring seating, in a top overhauled engine or a newly overhauled engine, operate the aircraft at 65% to 75% cruise power until oil consumption is stable." Can an engine break-in as little as 5 hours or is it typical not to consume oil during the break-in process?
For break-in I have been following the Lycoming's Service Instruction. 95% of the 5 hours was spent at 3,500 - 4,500ft with power settings between 65% and 75%.
After initial service I had about 9.5 quarts in it. After an hour of operations I had about 9.25 quarts in it so I put another quart in. After another 2 hours it was about 9.25 again. Seeing that the oil I put in was now relocated on the belly of the aircraft I left it at 9.25. After another few hours it's still at 9.25. So either it's not burning any oil or the amount is so minuscule that I can't notice it on the dip stick.
Per the Service Instruction "For correct piston ring seating, in a top overhauled engine or a newly overhauled engine, operate the aircraft at 65% to 75% cruise power until oil consumption is stable." Can an engine break-in as little as 5 hours or is it typical not to consume oil during the break-in process?