I've just performed the first oil change on my brand new Lyc IO-360, and it was a relief to find that both the oil-screen and the oil filter has no abnormal deposits, nor dind I find any screws, washers or nuts in them... hehe...
The oil consumption has decreased about 50% for every flight up until now:
First flight: 1 hr: oil consumption 0.5 litres
2nd: 1 hr 10 mins: oil 0,3 litres
3rd: 1 hr 40 mins: oil 0,2 litres
4th: 1 hr 10 mins: oil 0,1 litres
I'm flying at 75% and 65% power for now, varying power every 15 mins according to Lyc SB 1427C dated Des 29, 2010 where it says:
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.
Up until now, I've flown at mix full rich and the CHT's are around 350*F. No sign of CHT drop yet. (5,1 hrs tach)
I'm flying beetween 2000' and 2500' MSL and the OAT is 5-8*C at that altitude these days (Spring has just arrived here)
I'm wondering when I can start leaning?
I haven't found anything in the SB about when to start leaning during breakin, but here on the forum, (http://www.vansairforce.com/communit...ad.php?t=75132
) I found that at 75% I can lean to about 180*F ROP and at 65% I can lean to 100*F ROP.
I guess this numbers are for an engine already broken in, so it'd be nice to know when or if I schould lean to these numbers during breakin?
CHT's must ofcourse be kept below 400*F at all times, and with that in mind: when can I start leaning?
Or schould I continue flying at full rich until CHT drops (guess around 10 hrs?) and oil consumption is stable and normal?