Today's Message Index:
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1. 08:39 AM - Re: AnPMech-List Digest: 1 Msgs - 10/12/07 (John Markey)
2. 12:11 PM - Re: Re: AnPMech-List Digest: 1 Msgs - 10/12/07 (teamgrumman@aol.com)
Message 1
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| Subject: | Re: AnPMech-List Digest: 1 Msgs - 10/12/07 |
Richard, thanks for this insight. My mechanic is great and well known locally,
so I never take his opinions lightly. My guess is that he did replace several
engines and never looked back at the reformulated oils. Doing some on-line reading,
the Aero shell sight has an article about the original 100% synthetics
that caused a lot of lead related sludge around the rings, leading to high cylinder
wear and failures. Per this article, the blends of mineral and synthetic
took care of this.
The reason I ask is that, due to coming cold weather, I am putting AeroShell 15-50
back into my plane. I noticed that after switching over to Aero 100W Plus
this late Spring, I saw a higher oil loss & lower oil pressures, so much so that
I had to reset my alarm limit on my GRT 4000 monitor [after confirming level,
etc.]
I will have to repost about what I see after I switch back.
Any other observations from experience out there?
John
AnPMech-List Digest Server <anpmech-list@matronics.com> wrote: *
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AnPMech-List Digest Archive
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Total Messages Posted Fri 10/12/07: 1
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Today's Message Index:
----------------------
1. 04:39 AM - Re: Multi-Viscosity Oil (Richard Pottorff)
________________________________ Message 1 _____________________________________
Time: 04:39:22 AM PST US
From: "Richard Pottorff"
Subject: AnPMech-List: Re: Multi-Viscosity Oil
Multi-Viscosity oils flow better at low temperatures, so you get better
protection at start up. They also retain there thickness better at
operating temperatures, so you don't lose as much oil through the
pistons.
I think it was Mobil's synthetic oils that caused a lot of engine
damage, to the point that a lot of engines were replaced by the oil
company. Multi-Viscosity oil has been around a lot longer than that, and
if it was going to cause problems, it would already have, and they would
no longer be available for airplanes.
My $.02 worth.
Richard Pottorff A&P
---------------------------------
Fussy? Opinionated? Impossible to please? Perfect. Join Yahoo!'s user panel and
lay it on us.
Message 2
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| Subject: | Re: AnPMech-List Digest: 1 Msgs - 10/12/07 |
I've heard of this before. Are you seeing lower initial oil pressure?
or after the oil is at 190 degrees or so? I did some testing of
motorcycle racing oils when I was going to school. The initial
viscosity is, indeed, a LOT lower in multi-grade oils. But, they
didn't degrade as fast at higher temps, I tested them to 240 degrees,
as single grade oils. For what it's worth, the Castrol Racing oil was
the most consistent of the oils I tested.
-----Original Message-----
From: John Markey <markeypilot@yahoo.com>
Sent: Sat, 13 Oct 2007 08:39:13 -0700 (PDT)
Subject: AnPMech-List: Re: AnPMech-List Digest: 1 Msgs - 10/12/07
Richard, thanks for this insight. My mechanic is great and well known
locally, so I never take his opinions lightly. My guess is that he did
replace several engines and never looked back at the reformulated oils.
Doing some on-line reading, the Aero shell sight has an article about
the original 100% synthetics that caused a lot of lead related sludge
around the rings, leading to high cylinder wear and failures. Per this
article, the blends of mineral and synthetic took care of this.
The reason I ask is that, due to coming cold weather, I am putting
AeroShell 15-50 back into my plane. I noticed that after switching over
to Aero 100W Plus this late Spring, I saw a higher oil loss & lower oil
pressures, so much so that I had to reset my alarm limit on my GRT 4000
monitor [after confirming level, etc.]
I will have to repost about what I see after I switch back.
Any other observations from experience out there?
John
AnPMech-List
Digest Server <anpmech-list@matronics.com> wrote: *
=================================================
Online Versions of Today's List Digest Archive
=================================================
Today's complete AnPMech-List Digest can also be found in either of the
two Web Links listed below. The .html file includes the Digest
formatted
in HTML for viewing with a web browser and features Hyperlinked Indexes
and Message Navigation. The .txt file includes the plain ASCII version
of the AnPMech-List Digest and can be viewed with a generic text editor
such as Notepad or with a web browser.
HTML Version:
http://www.matronics.com/digest/digestview.php?Style=82701&View=html&Chapter 07-10-12&Archive=AnPMech
Text Version:
http://www.matronics.com/digest/digestview.php?Style=82701&View=txt&Chapter 07-10-12&Archive=AnPMech
===============================================
EMail Version of Today's List Digest Archive
===============================================
----------------------------------------------------------
AnPMech-List Digest Archive
---
Total Messages Posted Fri 10/12/07: 1
----------------------------------------------------------
Today's Message Index:
----------------------
1. 04:39 AM - Re: Multi-Viscosity Oil (Richard Pottorff)
________________________________ Message 1
_____________________________________
Time: 04:39:22 AM PST US
From: "Richard Pottorff"
Subject: AnPMech-List: Re: Multi-Viscosity
________________________________________________________________________
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