Removed cowlings. Noticed butterfly y-adapter was loose. Also, the butterfly valve control rod was bending and preventing smooth operation. The butterfly is also not fully open in ram mode....could this be contributing to noise in the MAP reading at full throttle. Will need to rethink the linkage and install some support.

Measured 7.8 qts oil. Ran engine until oil temp reached 150F. Drained oil (dark black). Replace filter and safety wired. Added 7 qts Aeroshell 80. Ran engine and no leaks observed.

Oil consumption rate for 4th flight was 0.06 qts/hr.