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waltmurphy(at)charter.net
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 Posted: Wed May 02, 2007 6:16 am Post subject: Aeroshell 100 |
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Question... I have always used Aeroshell with great results. But ,
lately I have been hearing things from customers that perform oil
analysis routinely that the "new" Aeroshell formulation causes higher
copper
results in their oil analysis. I had one tell me that once he changed
over to Phillips that the next 2 oil analysis results both showed copper
back to normal .
Has anyone had any info on Shell changing the formulation?
Thanks,
Walt
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wingsdown(at)verizon.net
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| Posted: Wed May 02, 2007 6:57 am Post subject: Aeroshell 100 |
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Symptoms can be problematic. He might want to change back once more to
see if copper goes up again. Then switch if necessary. I doubt either
oil would cause abnormal wear. If it is an experimental engine you can
run what you want. Keep in mind unless you have an engine modified for
unleaded you must run at least a semi-synthetic if you go in that
direction.
Rick
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apilot2(at)gmail.com
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| Posted: Wed May 02, 2007 11:52 am Post subject: Aeroshell 100 |
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The problem is caused by the additive Aeroshell uses to meet the
Lycoming AD requirement. They used to use TCP, but it is now TPP. As I
understand it, there is not a problem with straight Aeroshell (not
Plus) and not with Exxon or Phillips. I don't know if there is any
concern with the higher copper numbers. You might email Blackstone for
their opinion, and then write Shell and see if they have a comment.
On 5/2/07, Walt Murphy <waltmurphy(at)charter.net> wrote:
| Quote: |
Question... I have always used Aeroshell with great results. But ,
lately I have been hearing things from customers that perform oil
analysis routinely that the "new" Aeroshell formulation causes higher
copper
results in their oil analysis. I had one tell me that once he changed
over to Phillips that the next 2 oil analysis results both showed copper
back to normal .
Has anyone had any info on Shell changing the formulation?
Thanks,
Walt
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tompkinsl(at)integra.net
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| Posted: Thu May 03, 2007 7:27 am Post subject: Aeroshell 100 |
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Are you using 100 Plus? My understanding is that this is not a problem. The copper is in the oil anti-scuff additive and not coming from your engine.
Larry
[quote][b]
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frank.hinde(at)hp.com
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| Posted: Thu May 03, 2007 8:07 am Post subject: Aeroshell 100 |
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I think thats what it is....I just went for the cheapest AD oil. I have not gotten around to doing oil analysis and I'm not totally convinced of the benefit...Will have to think some more on this as its about the right time to be doing it.
Frank IO360 7a 150 hours
From: owner-engines-list-server(at)matronics.com [mailto:owner-engines-list-server(at)matronics.com] On Behalf Of Larry L. Tompkins, P.E.
Sent: Thursday, May 03, 2007 8:26 AM
To: engines-list(at)matronics.com
Subject: Re: Aeroshell 100
Are you using 100 Plus? My understanding is that this is not a problem. The copper is in the oil anti-scuff additive and not coming from your engine.
Larry
[quote]
href="http://www.matronics.com/Navigator?Engines-List">http://www.matronics.com/Navigator?Engines-List
href="http://forums.matronics.com">http://forums.matronics.com
[b]
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MONTY(at)bpaengines.com
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| Posted: Thu May 03, 2007 8:13 am Post subject: Aeroshell 100 |
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There is not very much copper in the Lycoming engines. Piston pin bushings, rocker arm bushings, couple of idler gear bushings. Only other place to be concerned would be the rod bearings and if they are down into the copper, idle oil pressure with the oil hot will tell you that story.
Monty Barrett
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GrummanDude
Joined: 15 Jan 2006
Posts: 926
Location: Auburn, CA
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| Posted: Thu May 03, 2007 10:08 am Post subject: Aeroshell 100 |
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ya know, every once in a while one person will have a problem with
something and suddenly it's a crisis.
I've been using 15w-50 for 15 years and never had anything out of the
ordinary occur. I can fly all year long (highs of 115 and lows of 10;
desert you know) on the same oil.
I've got customers who fly 20 hours a year and customers who fly 200
hours a year. They all use 15w-50. None of them ahve ever had the
sludge, rust, corrosion, or varnish problems my hangar neighbors have
had using single grade oil. The multi-grade is still the best oil for
the engine.
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_________________
Gary
AuCountry Aviation
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reichec
Joined: 23 Apr 2007
Posts: 26
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| Posted: Sun May 06, 2007 3:15 pm Post subject: Aeroshell 100 |
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Higher copper numbers are of no harm. Your (every) engine manufacturer
masks off areas that they dont want to be hardened with a copper oxide.
There is something that has changed in the aeroshell that causes the copper
to wash off.. there is no harm as there is regular steel or iron left
behind.... all it is is a coating for manufacturing processes. As far as
the lycoming rep is concerned, there are no copper wear parts in these
engines.
Charles
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glcasey(at)adelphia.net
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| Posted: Mon May 07, 2007 5:51 am Post subject: Aeroshell 100 |
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| Quote: |
I'm not sure I understand the comment about "no copper wear parts" in
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Lycoming engines. I'd bet there is some copper in the main and rod
bearings and the wrist pin plugs are brass (they used to be aluminum
until Lycoming ran into trouble with excessive wear of these items.
So they can wear). All the bushings for the accessory shafts are, as
far as I know, brass. They may, as mentioned below, use copper in
the heat treating process, but I've not heard of that before. No one
seems to know if there is copper in the oil, so if it were my engine
I'd still be mildly concerned.
Gary Casey
[quote]
Higher copper numbers are of no harm. Your (every) engine
manufacturer
masks off areas that they dont want to be hardened with a copper
oxide.
There is something that has changed in the aeroshell that causes
the copper
to wash off.. there is no harm as there is regular steel or iron left
behind.... all it is is a coating for manufacturing processes. As
far as
the lycoming rep is concerned, there are no copper wear parts in these
engines.
Charles
---
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