Return-Path: <13brv3@bellsouth.net> Received: from imf21aec.mail.bellsouth.net ([205.152.59.69] verified) by logan.com (CommuniGate Pro SMTP 4.2.1) with ESMTP id 402231 for flyrotary@lancaironline.net; Wed, 08 Sep 2004 11:29:46 -0400 Received-SPF: pass receiver=logan.com; client-ip=205.152.59.69; envelope-from=13brv3@bellsouth.net Received: from rd ([65.6.194.9]) by imf21aec.mail.bellsouth.net (InterMail vM.5.01.06.11 201-253-122-130-111-20040605) with ESMTP id <20040908152916.ERUS27018.imf21aec.mail.bellsouth.net@rd> for ; Wed, 8 Sep 2004 11:29:16 -0400 From: "Russell Duffy" <13brv3@bellsouth.net> To: "'Rotary motors in aircraft'" Subject: oil viscosity? Date: Wed, 8 Sep 2004 10:29:25 -0500 Message-ID: <000001c495b8$9fd34240$6101a8c0@rd> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0001_01C4958E.B6FD3A40" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6626 Importance: Normal X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 This is a multi-part message in MIME format. ------=_NextPart_000_0001_01C4958E.B6FD3A40 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable Greetings again, =20 For my next question, what weight of oil are you using? I'm using Mobil = 1 SuperSyn, and have only used 15W-50 so far. I don't know about the = RX-8, but I know that almost every vehicle on the planet uses 5W-30 now. I bought some 5W-30 the other day, but still haven't decided if I'll use = it, or swap it for one of the other weights. =20 =20 =20 My thinking when picking up the 5W-30 was to limit the resistance = through the cooler, and filter. I also understand that lower viscosity oil will probably provide better cooling, due to higher flow, and perhaps better = heat transfer. It would also limit the initial pressures that will be seen = on a cold startup. Bruce did mention that he thinks Tracy prefers the higher weight oils for the benefit of the redrive, since it's using engine oil, rather than the proper gear lube. Of course, these are auto = transmission gears, which don't use heavy lube anyway. =20 =20 SuperSyn comes in 5W-30, 10W-30, and 15W-50, so which would be best? =20 Thanks, Rusty (drinking low viscosity coffee) ------=_NextPart_000_0001_01C4958E.B6FD3A40 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable Message
Greetings=20 again,
 
For my next = question, what=20 weight of oil are you using?  I'm using Mobil 1 SuperSyn, and have = only=20 used 15W-50 so far.  I don't know about the RX-8, but I know that = almost=20 every vehicle on the planet uses 5W-30 now.   I bought some = 5W-30 the=20 other day, but still haven't decided if I'll use it, or swap it for one = of the=20 other weights. 
 
 
My thinking = when picking up=20 the 5W-30 was to limit the resistance through the cooler, and = filter.  I=20 also understand that lower viscosity oil will probably provide better = cooling,=20 due to higher flow, and perhaps better heat transfer.  It = would also=20 limit the initial pressures that will be seen on a cold startup.  = Bruce did=20 mention that he thinks Tracy prefers the higher weight oils for the = benefit of=20 the redrive, since it's using engine oil, rather than the proper gear=20 lube.  Of course, these are auto transmission gears, which don't = use heavy=20 lube anyway.   
 
SuperSyn comes = in 5W-30,=20 10W-30, and 15W-50, so which would be best?
 
Thanks,
Rusty (drinking low viscosity=20 coffee)
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