Initial Oil Fill

CharlieWaffles · #1 07-13-2012, 06:19 PM

So the lycoming Service instructions are a little vague on this, but I'm trying to figure out the initial oil fill for my IO-540. It holds a maximum of 12 quarts, so should I fill it 100% when I fill it? I'm using mineral oil of course and did the process to remove the preserving oil, etc... So I'm wondering if I fill it all the way as for the operational planes I fly we always keep it lower at like 8 quarts.

Also, what about the lines and oil cooler - they have to factor into the oil quantity. So do I need to fill and some how get it pumped into the oil cooler and THEN fill to the full 12 quarts?

Mike S · #2 07-13-2012, 06:24 PM

How I did it was to put in 9 quarts, knowing that the engine will have enough oil to be safely run.

I planned on changing oil after 5 hours or so, and didnt see any reason to throw away any more $$$ on oil than I had to.

I still only fill to 9 quarts, plus a can of Cam Guard.

Wayne Gillispie · #3 07-13-2012, 09:23 PM

By removing lower plug from each cylinder, disconnecting plug leads from remaining plugs, turning over with starter until oil came out pressure sender hose. First flight with 10.5 Qts. I maintain 9-10 at all times.

aerhed · #4 07-13-2012, 09:34 PM

Nine to start. I run at 8.

RV10inOz · #5 07-14-2012, 05:25 AM

And a few on VAF have found that when maintained between 6-7Qts, there is none on the belly and only in flight burn is recorded.

I have found this to be true.

There are no hard rules here....I think you guys use the saying YMMV.