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markeypilot(at)yahoo.com
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 Posted: Sat Oct 13, 2007 7:39 am Post subject: AnPMech-List Digest: 1 Msgs - 10/12/07 |
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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(at)matronics.com> wrote:[quote] *
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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:
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1. 04:39 AM - Re: Multi-Viscosity Oil (Richard Pottorff)
________________________________ Message 1 _____________________________________
Time: 04:39:22 AM PST US
From: "Richard Pottorff"
Subject: Re: Multi-Viscosity [quote][b]
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GrummanDude
Joined: 15 Jan 2006
Posts: 926
Location: Auburn, CA
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| Posted: Sat Oct 13, 2007 11:11 am Post subject: AnPMech-List Digest: 1 Msgs - 10/12/07 |
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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.
--
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Gary
AuCountry Aviation
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