cdeerinck
Well Known Member
In the Lycming Operator's manual for O-360 and associated models, Section 3, page 3-1, there is the following paragraph:
How does one resolve the "no further break-in is necessary" with the requirement to accumulate 50 hours at 65%+ power. Doesn't that constitute "further break-in"?
Also, at how many hours does oil consumption typically stabalize?
New engines have been carefully run-in by Lycoming and therefore, no further break-in is necessary insofar as operation is concerned; however, new or newly overhauled engines should be operated on straight mineral oil for a minimum of 50 hours or until oil consumption has stabilized. After this period, a change to an approved additive oil may be made, if so desired.
NOTE
Cruising should be done at 65% to 75% power until a total of 50 hours has accumulated or oil consumption has stabilized. This is to ensure proper seating of the rings and is applicable to new engines, and engines in service following cylinder replacement or top overhaul of one or more cylinders.
How does one resolve the "no further break-in is necessary" with the requirement to accumulate 50 hours at 65%+ power. Doesn't that constitute "further break-in"?
Also, at how many hours does oil consumption typically stabalize?