Mailing List flyrotary@lancaironline.net Message #19785
From: jesse farr <jesse@jessfarr.com>
Subject: Re: [FlyRotary] Re: Break In Period?
Date: Mon, 4 Apr 2005 23:06:50 -0400
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Message
You may be absolutely correct in those thoughts, be sure and let us all know.  All I know is I have never had reciprocating rings seat worth a darn with detergent and/or more so synthetic oil; but, then again, rings don't move up and down against multiple honed cyinder, etc..  So, who knows, our basically two cylinder walls and six rings may actually work out better. rots a ruck.
jofarr
----- Original Message ----- From: Russell Duffy
 
I personally think the whole "never use synthetic oil for break-in" recommendation is mostly folklore.  Corvettes, and probably a number of other engines come straight off the assembly line with full synthetic, and they've got a lot more parts to seat that we do.  Sump oil is irrelevant for apex seals, and half irrelevant for side seals.  Oil rings, yeah, those are new.  There's only one new bearing, in the whole engine though.  I think I'll be OK... or not :-)
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