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mtherr(at)yahoo.com
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 Posted: Tue Mar 07, 2006 7:35 pm Post subject: Subaru oil and avgas |
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I'm presently using Castrol Syntech 5-50 oil on my
Subaru powered CH601-HD. Now, I'd like to make longer
flights and use avgas, but I learned that synthetic
oil is no good with leaded gas.
I'm wondering if anyone here flying a Subaru uses
aviation oil on their automotive conversions. I'm
thinking about the Shell 15w-40 semi-synthetic oil.
Are there any other good alternatives for oil
compatible with avgas?
Michel
do not archive
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Michel Therrien CH601-HD, C-GZGQ
http://mthobby.pcperfect.com/ch601
http://www.zenithair.com/bldrlist/profiles/mthobby
http://pages.infinit.net/mthobby
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mike.sinclair(at)ATT.NET
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| Posted: Tue Mar 07, 2006 8:32 pm Post subject: Subaru oil and avgas |
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Michel
I don't remember whether it was someone from LEAF or from Lockwood that
told me, but I'm using Valvoline Durablend 10w-40 in my 912. It's a semi
synthetic and from my limited understanding, it suspends the lead
particles that would accumulate on the internal surfaces of the engine. I
was told that it will work with mogas and avgas, bit if using avgas
during any period the oil changes are then supposed to be on a more
frequent basis. I would suspect that the Subaru is affected much the same
as the Rotax. It has got my curiosity up and now I'm going to have to
look back into the pro's and con's of the different types of oil. I do
know that my original engine documentation listed several brands of oil,
but when I tried to locate them (such as this one Shell designation that
seemed to be the one for an occasional avgas usage), I was told that
these types listed in the Rotax documentation were European blends only
and not available in the US. That was when I started the phone calls to
the experts. I believe I still have the answer somewhere, but am unable
to locate it right now, so will now need to begin the questioning again.
I did a search of the archives and didn't find a suitable answer there.
It is also possible that a current answer may be in the Rotax service
bulletins but haven't had a chance to peruse them again yet (but it is on
my to do right away list). If anyone out there can point us in the right
direction for this information, or have a definitive answer on oil types,
it would be much appreciated.
Mike Sinclair N701TD Back out of Phase I, and most certainly impressed
with the performance of the 912uls as compared to the 80hp engine. It's
like a whole new airplane! At gross it outperforms what it used to do
with just me and minimum fuel. Though being a 701 it still don't go fast,
just gets up there quicker.
Michel Therrien wrote:
| Quote: |
I'm presently using Castrol Syntech 5-50 oil on my
Subaru powered CH601-HD. Now, I'd like to make longer
flights and use avgas, but I learned that synthetic
oil is no good with leaded gas.
I'm wondering if anyone here flying a Subaru uses
aviation oil on their automotive conversions. I'm
thinking about the Shell 15w-40 semi-synthetic oil.
Are there any other good alternatives for oil
compatible with avgas?
Michel
----------------------------
Michel Therrien CH601-HD, C-GZGQ
http://mthobby.pcperfect.com/ch601
http://www.zenithair.com/bldrlist/profiles/mthobby
http://pages.infinit.net/mthobby
|
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bryanmmartin
Joined: 10 Jan 2006
Posts: 1018
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| Posted: Wed Mar 08, 2006 3:50 am Post subject: Subaru oil and avgas |
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My Stratus manual suggests using Castrol 20W-50 non-synthetic oil. It also
suggests that the oil change interval be cut in half if avgas is used.
--
Bryan Martin
N61BM, CH 601 XL, Stratus Subaru.
on 3/7/06 10:34 PM, Michel Therrien at mtherr(at)yahoo.com wrote:
| Quote: |
I'm presently using Castrol Syntech 5-50 oil on my
Subaru powered CH601-HD. Now, I'd like to make longer
flights and use avgas, but I learned that synthetic
oil is no good with leaded gas.
I'm wondering if anyone here flying a Subaru uses
aviation oil on their automotive conversions. I'm
thinking about the Shell 15w-40 semi-synthetic oil.
Are there any other good alternatives for oil
compatible with avgas?
Michel
do not archive
----------------------------
Michel Therrien CH601-HD, C-GZGQ
http://mthobby.pcperfect.com/ch601
http://www.zenithair.com/bldrlist/profiles/mthobby
http://pages.infinit.net/mthobby
|
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_________________
--
Bryan Martin
N61BM, CH 601 XL, Stratus Subaru.
do not archive. |
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daveaustin2(at)sprint.ca
Guest
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| Posted: Wed Mar 08, 2006 6:10 am Post subject: Subaru oil and avgas |
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Mike,
I use synthetic oil all the time in my 912. I've flown to Oshkosh and
Florida using avgas 100LL after the initial tankfull was used with no
noticeable sludge build-up. I did change the oil after those trips, but for
the usual one fill with avgas and one with mogas I've had no trouble at all.
Change oil once per year.
Dave Austin 601HDS - 912, Spitfire Mk VIII
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frank.hinde(at)hp.com
Guest
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| Posted: Wed Mar 08, 2006 6:55 am Post subject: Subaru oil and avgas |
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Just use mineral oil. I use castrol 20-50 and it is just fine with
Avgas. You might want to change your oil at say 30 hours with 100LL.
I think there is a danger of spending more money on oil than the engine
is worth.
Frank
Do not archive
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mike.sinclair(at)ATT.NET
Guest
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| Posted: Wed Mar 08, 2006 9:39 am Post subject: Subaru oil and avgas |
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Dave, and any others interested
I did a search of the Rotax Service Instructions and did find oil info in
SI-18-1997 R5 dated 9/2004. Listed in the sevice instruction was the Valvoline
Durablend 10w-40 semi synthetic oil. It was one of two "Recommended for normal
(lower than 120C/250F) and high temperature (higher than 120C/250F) operation
using leaded or unleaded fuels". The other was the SHELL Formula Shell
Synthetic Blend APISJ SAE 10w-30. Another oil listed that said "Highly
Recommended" in the above quote was the SHELL Advance VSX4 in either 10w-40 or
15w-50. However I believe that was the blend available in Europe only. This 6
page document is available on www.rotax-owner.com and can be accessed by logging
on as a guest user if so desired. It does include some good sense engine
operation guidelines and mentions residue formation and cylinder glazing among
other things concerning use of leaded fuel. It's a quick read and some decent
info to file away in a mental compartment for future reference. Now I still
can't say how this relates to the Subaru engine (or others), but suspect that a
lot of the operation principals will be the same.
Mike Sinclair
Now if the wind here in Kansas would die down just a tad, even the jets flying
over are in a crab. Would have a good ground speed going north though. Just not
sure how long it would take to get back.
Dave Austin wrote:
| Quote: |
Mike,
I use synthetic oil all the time in my 912. I've flown to Oshkosh and
Florida using avgas 100LL after the initial tankfull was used with no
noticeable sludge build-up. I did change the oil after those trips, but for
the usual one fill with avgas and one with mogas I've had no trouble at all.
Change oil once per year.
Dave Austin 601HDS - 912, Spitfire Mk VIII
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mtherr(at)yahoo.com
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