Today's Message Index:
----------------------
1. 02:46 AM - Re: Re: 25W-60 vs 20W-50 for the Housai? (\)
2. 04:47 AM - Re: Re: 25W-60 vs 20W-50 for the Housai? (JEREMY KEYES)
3. 06:07 AM - Re: Re: 25W-60 vs 20W-50 for the Housai? (Richard Goode)
4. 06:23 AM - Re: Re: 25W-60 vs 20W-50 for the Housai? (Richard Hess)
5. 07:31 AM - Re: Re: 25W-60 vs 20W-50 for the Housai? (Justin Drafts)
6. 11:47 AM - Re: Re: 25W-60 vs 20W-50 for the Housai? (Walter Lannon)
7. 08:51 PM - Re: Re: 25W-60 vs 20W-50 for the Housai? (Royden Heays)
Message 1
| INDEX | Back to Main INDEX |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: 25W-60 vs 20W-50 for the Housai? |
I used Aeroshell 100 Plus year around in my M-14 with regular changes at 40
hours.=C2- Each time I used a multi-grade I got oil leaks.=C2- I found
on opening my engine (top over hauls to zero overhauls) the inside looked
and was fairly clean.=C2- Might note though, with the exception of OSH tr
ips, I flew mostly in the Florida skies.=C2- Plus most of the time I'd cr
uise at 1780 rpm and 26" manifold pressure.=C2-Jim "Pappy" Goolsby
-----Original Message-----
From: Walter Lannon <wlannon@shaw.ca>
Sent: Sun, Jul 28, 2019 9:29 pm
Subject: Re: Yak-List: Re: 25W-60 vs 20W-50 for the Housai?
I see no problem with X/C 25W60 year round.=C2- That is the advantage of
a
multi-grade.=C2- Just stay to hell away from Aeroshell=C2- semi-synthet
ic W15W50.
Walt
-----Original Message-----
From: Jon Boede
Sent: Sunday, July 28, 2019 1:21 PM
Subject: Re: Yak-List: Re: 25W-60 vs 20W-50 for the Housai?
25W50 in the winter, radial 120 in the summer.
> On Jul 28, 2019, at 3:19 PM, Justin Drafts <draftsjust417@gmail.com>
> wrote:
>
> Ok CJ6-ers, at least those of you with the Housai engines...
> Which is your preferred oil, Phillips X/C 20W-50, or their 25W-60?
>
> (I've been using 20W-50 in Seattle w/o issues, but perhaps the 25W-60 is
> better?)
>
> Thoughts, experiences?
>
> Justin
> N280NC
>
---
This email has been checked for viruses by Avast antivirus software.
https://www.avast.com/antivirus
S -
WIKI -
-
=C2- =C2- =C2- =C2- =C2- -Matt Dralle, List Admin.
Message 2
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: 25W-60 vs 20W-50 for the Housai? |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Message 3
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: 25W-60 vs 20W-50 for the Housai? |
We feel strongly that these engines are not designed for modern
multigrade oils, and whatever the nominal viscosity might be, they are
definitely far thinner, particularly when hot, than mono-grade oils. And
this definitely leads to oil leaks.
Richard
RICHARD GOODE AEROBATICS
Rhodds Farm, Lyonshall, Hereford, HR5 3LW, UK
Tel: +44 (0)1544 340120 Fax: +44 (0)1544 340129
e-mail: richard.goode@russianaeros.com
<mailto:richard.goode@russianaeros.com>
<http://www.russianaeros.com> www.russianaeros.com
WORLD LEADERS IN RUSSIAN SPORTING AIRCRAFT & ENGINES
In partnership with Aerometal Kft, Hungary.
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of JEREMY KEYES
Sent: 29 July 2019 12:48
Subject: Re: Yak-List: Re: 25W-60 vs 20W-50 for the Housai?
We use the same Aeroshell 100 Plus in the CJ. After talking with a
number of folks we decided to make the switch and it=99s seems to
well. I have noticed less oil leaks as well but we also recently changed
mechanics and did an extra through annual.
On Jul 29, 2019, at 4:54 AM, "cjpilot710@aol.com
<mailto:cjpilot710@aol.com> " <cjpilot710@aol.com
<mailto:cjpilot710@aol.com> > wrote:
I used Aeroshell 100 Plus year around in my M-14 with regular changes at
40 hours. Each time I used a multi-grade I got oil leaks. I found on
opening my engine (top over hauls to zero overhauls) the inside looked
and was fairly clean. Might note though, with the exception of OSH
trips, I flew mostly in the Florida skies. Plus most of the time I'd
cruise at 1780 rpm and 26" manifold pressure.
Jim "Pappy" Goolsby
-----Original Message-----
From: Walter Lannon <wlannon@shaw.ca <mailto:wlannon@shaw.ca> >
Sent: Sun, Jul 28, 2019 9:29 pm
Subject: Re: Yak-List: Re: 25W-60 vs 20W-50 for the Housai?
<mailto:wlannon@shaw.ca> >
I see no problem with X/C 25W60 year round. That is the advantage of a
multi-grade. Just stay to hell away from Aeroshell semi-synthetic
W15W50.
Walt
-----Original Message-----
From: Jon Boede
Sent: Sunday, July 28, 2019 1:21 PM
Subject: Re: Yak-List: Re: 25W-60 vs 20W-50 for the Housai?
<mailto:jonboede@hotmail.com> >
25W50 in the winter, radial 120 in the summer.
> On Jul 28, 2019, at 3:19 PM, Justin Drafts <draftsjust417@gmail.com
<mailto:draftsjust417@gmail.com> >
> wrote:
>
> Ok CJ6-ers, at least those of you with the Housai engines...
> Which is your preferred oil, Phillips X/C 20W-50, or their 25W-60?
>
> (I've been using 20W-50 in Seattle w/o issues, but perhaps the 25W-60
is
> better?)
>
> Thoughts, experiences?
>
> Justin
> N280NC
>
---
This email has been checked for viruses by Avast antivirus software.
https://www.avast.com/antivirus
Message 4
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: 25W-60 vs 20W-50 for the Housai? |
When Mongoose was brand new I tried both multi and mono grade. I=99ve u
sed 100W for 16 years
Richard Hess
C 404-964-4885
> On Jul 29, 2019, at 8:58 AM, Richard Goode <richard.goode@russianaeros.com
> wrote:
>
> We feel strongly that these engines are not designed for modern multigrade
oils, and whatever the nominal viscosity might be, they are definitely far t
hinner, particularly when hot, than mono-grade oils. And this definitely lea
ds to oil leaks.
>
> Richard
>
>
> RICHARD GOODE AEROBATICS
> Rhodds Farm, Lyonshall, Hereford, HR5 3LW, UK
> Tel: +44 (0)1544 340120 Fax: +44 (0)1544 340129
> e-mail: richard.goode@russianaeros.com
> www.russianaeros.com
> WORLD LEADERS IN RUSSIAN SPORTING AIRCRAFT & ENGINES
> In partnership with Aerometal Kft, Hungary.
>
> From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@ma
tronics.com] On Behalf Of JEREMY KEYES
> Sent: 29 July 2019 12:48
> To: yak-list@matronics.com
> Subject: Re: Yak-List: Re: 25W-60 vs 20W-50 for the Housai?
>
> We use the same Aeroshell 100 Plus in the CJ. After talking with a number o
f folks we decided to make the switch and it=99s seems to well. I have
noticed less oil leaks as well but we also recently changed mechanics and d
id an extra through annual.
>
> On Jul 29, 2019, at 4:54 AM, "cjpilot710@aol.com" <cjpilot710@aol.com> wro
te:
>
> I used Aeroshell 100 Plus year around in my M-14 with regular changes at 4
0 hours. Each time I used a multi-grade I got oil leaks. I found on openin
g my engine (top over hauls to zero overhauls) the inside looked and was fai
rly clean. Might note though, with the exception of OSH trips, I flew mostl
y in the Florida skies. Plus most of the time I'd cruise at 1780 rpm and 26
" manifold pressure.
> Jim "Pappy" Goolsby
>
>
> -----Original Message-----
> From: Walter Lannon <wlannon@shaw.ca>
> To: yak-list <yak-list@matronics.com>
> Sent: Sun, Jul 28, 2019 9:29 pm
> Subject: Re: Yak-List: Re: 25W-60 vs 20W-50 for the Housai?
>
>
> I see no problem with X/C 25W60 year round. That is the advantage of a
> multi-grade. Just stay to hell away from Aeroshell semi-synthetic W15W50
.
>
> Walt
>
> -----Original Message-----
> From: Jon Boede
> Sent: Sunday, July 28, 2019 1:21 PM
> To: yak-list@matronics.com
> Subject: Re: Yak-List: Re: 25W-60 vs 20W-50 for the Housai?
>
>
> 25W50 in the winter, radial 120 in the summer.
>
> > On Jul 28, 2019, at 3:19 PM, Justin Drafts <draftsjust417@gmail.com>
> > wrote:
> >
> > Ok CJ6-ers, at least those of you with the Housai engines...
> > Which is your preferred oil, Phillips X/C 20W-50, or their 25W-60?
> >
> > (I've been using 20W-50 in Seattle w/o issues, but perhaps the 25W-60 is
> > better?)
> >
> > Thoughts, experiences?
> >
> > Justin
> > N280NC
> >
>
>
>
>
> ---
> This email has been checked for viruses by Avast antivirus software.
> https://www.avast.com/antivirus
>
>
>
>
Message 5
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: 25W-60 vs 20W-50 for the Housai? |
Good info, thanks gents!
On Mon, Jul 29, 2019 at 6:03 AM Walter Lannon <wlannon@shaw.ca> wrote:
>
> I see no problem with X/C 25W60 year round. That is the advantage of a
> multi-grade. Just stay to hell away from Aeroshell semi-synthetic W15W50.
>
> Walt
>
> -----Original Message-----
> From: Jon Boede
> Sent: Sunday, July 28, 2019 1:21 PM
> To: yak-list@matronics.com
> Subject: Re: Yak-List: Re: 25W-60 vs 20W-50 for the Housai?
>
>
> 25W50 in the winter, radial 120 in the summer.
>
> > On Jul 28, 2019, at 3:19 PM, Justin Drafts <draftsjust417@gmail.com>
> > wrote:
> >
> > Ok CJ6-ers, at least those of you with the Housai engines...
> > Which is your preferred oil, Phillips X/C 20W-50, or their 25W-60?
> >
> > (I've been using 20W-50 in Seattle w/o issues, but perhaps the 25W-60 is
> > better?)
> >
> > Thoughts, experiences?
> >
> > Justin
> > N280NC
> >
>
>
> ---
> This email has been checked for viruses by Avast antivirus software.
> https://www.avast.com/antivirus
>
>
Message 6
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: 25W-60 vs 20W-50 for the Housai? |
Hi Richard;
You are quite likely referring here to automotive oils which are far too
thin for use in any aircraft engine and, in any case, must never be used
due to the potential for pre-ignition in an air-cooled engine.
As far as I=99m aware there are are only two companies producing
an approved aviation multi-grade oil (I=99m sure if there are more
I will soon become aware!). They are Phillips with their X/C 20W50 and
X/C 25W60 (Radial) petroleum based oil and Aeroshell with their
semi-synthetic W15W50.
I=99m sure if you go to the above companies websites you will find
a description of how a multi-grade works in service. It is not quite as
you describe.
You are describing a non multi-grade oil which is far thinner when hot.
The multi-grade is far thinner when cold (first viscosity number).
With increasing temperature the multi-grade does not get
=9Cthicker=9D as some postulate but will get thinner at a
greatly reduced rate compared to a non multi oil with the result being
the second viscosity number is reached at the operating temperature for
both oils. If you could view this on a graph you would see the non
multi viscosity reducing sharply with increasing temperature while the
multi-grade gets there in virtually a straight line.
I believe the X/C 25W60 is a good choice for the M14P if you want the
convenience but no better than a seasonal change from 100 to 120 AD
oils.
With the exception of the above Aeroshell product I can pretty much
guarantee the leakage problem has little or nothing to do with the
choice of oil.
Best;
Walt
From: Richard Goode
Sent: Monday, July 29, 2019 5:58 AM
Subject: RE: Yak-List: Re: 25W-60 vs 20W-50 for the Housai?
We feel strongly that these engines are not designed for modern
multigrade oils, and whatever the nominal viscosity might be, they are
definitely far thinner, particularly when hot, than mono-grade oils. And
this definitely leads to oil leaks.
Richard
RICHARD GOODE AEROBATICS
Rhodds Farm, Lyonshall, Hereford, HR5 3LW, UK
Tel: +44 (0)1544 340120 Fax: +44 (0)1544 340129
e-mail: richard.goode@russianaeros.com
www.russianaeros.com
WORLD LEADERS IN RUSSIAN SPORTING AIRCRAFT & ENGINES
In partnership with Aerometal Kft, Hungary.
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of JEREMY KEYES
Sent: 29 July 2019 12:48
Subject: Re: Yak-List: Re: 25W-60 vs 20W-50 for the Housai?
We use the same Aeroshell 100 Plus in the CJ. After talking with a
number of folks we decided to make the switch and it=99s seems to
well. I have noticed less oil leaks as well but we also recently changed
mechanics and did an extra through annual.
On Jul 29, 2019, at 4:54 AM, "cjpilot710@aol.com" <cjpilot710@aol.com>
wrote:
I used Aeroshell 100 Plus year around in my M-14 with regular changes
at 40 hours. Each time I used a multi-grade I got oil leaks. I found
on opening my engine (top over hauls to zero overhauls) the inside
looked and was fairly clean. Might note though, with the exception of
OSH trips, I flew mostly in the Florida skies. Plus most of the time
I'd cruise at 1780 rpm and 26" manifold pressure.
Jim "Pappy" Goolsby
-----Original Message-----
From: Walter Lannon <wlannon@shaw.ca>
To: yak-list <yak-list@matronics.com>
Sent: Sun, Jul 28, 2019 9:29 pm
Subject: Re: Yak-List: Re: 25W-60 vs 20W-50 for the Housai?
I see no problem with X/C 25W60 year round. That is the advantage of
a
multi-grade. Just stay to hell away from Aeroshell semi-synthetic
W15W50.
Walt
-----Original Message-----
From: Jon Boede
Sent: Sunday, July 28, 2019 1:21 PM
To: yak-list@matronics.com
Subject: Re: Yak-List: Re: 25W-60 vs 20W-50 for the Housai?
25W50 in the winter, radial 120 in the summer.
> On Jul 28, 2019, at 3:19 PM, Justin Drafts <draftsjust417@gmail.com>
> wrote:
>
> Ok CJ6-ers, at least those of you with the Housai engines...
> Which is your preferred oil, Phillips X/C 20W-50, or their 25W-60?
>
> (I've been using 20W-50 in Seattle w/o issues, but perhaps the
25W-60 is
> better?)
>
> Thoughts, experiences?
>
> Justin
> N280NC
>
---
This email has been checked for viruses by Avast antivirus software.
https://www.avast.com/antivirus
Message 7
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: 25W-60 vs 20W-50 for the Housai? |
Ladies & Gents
Jill has on several occasions given her views on this list on the use of
Aeroshell W100 vs Philips 25W60 in the M14P engines.
She comes down on the side of Aeroshell with good reasons given. Try and
search on the list to see her previous posts.
That was before Shell launched the Plus version, which by all accounts
now obviates the need for supplementing Aeroshell W100 with CamGuard.
Jill=99s W100 recommendation extends to W80 and W120, depending on
the season and your location.
Jill, do you have anything to add or correct?
Regards
Royden
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of Walter Lannon
Sent: Monday, July 29, 2019 11:47 AM
Subject: Re: Yak-List: Re: 25W-60 vs 20W-50 for the Housai?
Hi Richard;
You are quite likely referring here to automotive oils which are far too
thin for use in any aircraft engine and, in any case, must never be used
due to the potential for pre-ignition in an air-cooled engine.
As far as I=99m aware there are are only two companies producing
an approved aviation multi-grade oil (I=99m sure if there are more
I will soon become aware!). They are Phillips with their X/C 20W50 and
X/C 25W60 (Radial) petroleum based oil and Aeroshell with their
semi-synthetic W15W50.
I=99m sure if you go to the above companies websites you will find
a description of how a multi-grade works in service. It is not quite as
you describe.
You are describing a non multi-grade oil which is far thinner when hot.
The multi-grade is far thinner when cold (first viscosity number).
With increasing temperature the multi-grade does not get
=9Cthicker=9D as some postulate but will get thinner at a
greatly reduced rate compared to a non multi oil with the result being
the second viscosity number is reached at the operating temperature for
both oils. If you could view this on a graph you would see the non
multi viscosity reducing sharply with increasing temperature while the
multi-grade gets there in virtually a straight line.
I believe the X/C 25W60 is a good choice for the M14P if you want the
convenience but no better than a seasonal change from 100 to 120 AD
oils.
With the exception of the above Aeroshell product I can pretty much
guarantee the leakage problem has little or nothing to do with the
choice of oil.
Best;
Walt
From: Richard Goode <mailto:richard.goode@russianaeros.com>
Sent: Monday, July 29, 2019 5:58 AM
Subject: RE: Yak-List: Re: 25W-60 vs 20W-50 for the Housai?
We feel strongly that these engines are not designed for modern
multigrade oils, and whatever the nominal viscosity might be, they are
definitely far thinner, particularly when hot, than mono-grade oils. And
this definitely leads to oil leaks.
Richard
RICHARD GOODE AEROBATICS
Rhodds Farm, Lyonshall, Hereford, HR5 3LW, UK
Tel: +44 (0)1544 340120 Fax: +44 (0)1544 340129
e-mail: richard.goode@russianaeros.com
<mailto:richard.goode@russianaeros.com>
<http://www.russianaeros.com> www.russianaeros.com
WORLD LEADERS IN RUSSIAN SPORTING AIRCRAFT & ENGINES
In partnership with Aerometal Kft, Hungary.
From: owner-yak-list-server@matronics.com
<mailto:owner-yak-list-server@matronics.com>
[mailto:owner-yak-list-server@matronics.com] On Behalf Of JEREMY KEYES
Sent: 29 July 2019 12:48
Subject: Re: Yak-List: Re: 25W-60 vs 20W-50 for the Housai?
We use the same Aeroshell 100 Plus in the CJ. After talking with a
number of folks we decided to make the switch and it=99s seems to
well. I have noticed less oil leaks as well but we also recently changed
mechanics and did an extra through annual.
On Jul 29, 2019, at 4:54 AM, "cjpilot710@aol.com
<mailto:cjpilot710@aol.com> " <cjpilot710@aol.com
<mailto:cjpilot710@aol.com> > wrote:
I used Aeroshell 100 Plus year around in my M-14 with regular changes at
40 hours. Each time I used a multi-grade I got oil leaks. I found on
opening my engine (top over hauls to zero overhauls) the inside looked
and was fairly clean. Might note though, with the exception of OSH
trips, I flew mostly in the Florida skies. Plus most of the time I'd
cruise at 1780 rpm and 26" manifold pressure.
Jim "Pappy" Goolsby
-----Original Message-----
From: Walter Lannon <wlannon@shaw.ca <mailto:wlannon@shaw.ca> >
Sent: Sun, Jul 28, 2019 9:29 pm
Subject: Re: Yak-List: Re: 25W-60 vs 20W-50 for the Housai?
<mailto:wlannon@shaw.ca> >
I see no problem with X/C 25W60 year round. That is the advantage of a
multi-grade. Just stay to hell away from Aeroshell semi-synthetic
W15W50.
Walt
-----Original Message-----
From: Jon Boede
Sent: Sunday, July 28, 2019 1:21 PM
Subject: Re: Yak-List: Re: 25W-60 vs 20W-50 for the Housai?
<mailto:jonboede@hotmail.com> >
25W50 in the winter, radial 120 in the summer.
> On Jul 28, 2019, at 3:19 PM, Justin Drafts <draftsjust417@gmail.com
<mailto:draftsjust417@gmail.com> >
> wrote:
>
> Ok CJ6-ers, at least those of you with the Housai engines...
> Which is your preferred oil, Phillips X/C 20W-50, or their 25W-60?
>
> (I've been using 20W-50 in Seattle w/o issues, but perhaps the 25W-60
is
> better?)
>
> Thoughts, experiences?
>
> Justin
> N280NC
>
---
This email has been checked for viruses by Avast antivirus software.
https://www.avast.com/antivirus
<https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm
_campaign=sig-email&utm_content=emailclient>
Virus-free.
<https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm
_campaign=sig-email&utm_content=emailclient> www.avast.com
Other Matronics Email List Services
These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.
-- Please support this service by making your Contribution today! --
|