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Kelly McMullen
Joined: 16 Apr 2008
Posts: 1188
Location: Sun Lakes AZ
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 Posted: Fri Sep 17, 2021 6:18 am Post subject: G100UL |
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Having just watched the AOPA webinar on the implementation of making this fuel available, the one area not addressed is whether amateur built experimental aircraft would need to do any paperwork to use the fuel. Type certificated aircraft will require an STC, just like they do for using mogas. Seems to me that we could just change our fuel placards to read G100UL or 100LL required, and start using it. Would be interesting to get EAA's opinion on this from one of their legal and technical experts.If we don't need anything, it would reduce GAMI's potential income a bit, although they still will get licensing/patent fees anyway.
There is no question in my mind that any IO-540 that is currently installed in a -10 and runs satisfactorily on 100LL will be fine on G100UL.
Especially since the stock engine was originally certified on 91/96 Avgas.
Kelly
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Kelly McMullen
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Ceengland
Joined: 11 Oct 2020
Posts: 391
Location: MS
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| Posted: Fri Sep 17, 2021 7:04 am Post subject: G100UL |
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On 9/17/2021 9:17 AM, Kelly McMullen wrote:
| Quote: | Having just watched the AOPA webinar on the implementation of making this fuel available, the one area not addressed is whether amateur built experimental aircraft would need to do any paperwork to use the fuel. Type certificated aircraft will require an STC, just like they do for using mogas. Seems to me that we could just change our fuel placards to read G100UL or 100LL required, and start using it. Would be interesting to get EAA's opinion on this from one of their legal and technical experts. If we don't need anything, it would reduce GAMI's potential income a bit, although they still will get licensing/patent fees anyway.
There is no question in my mind that any IO-540 that is currently installed in a -10 and runs satisfactorily on 100LL will be fine on G100UL.
Especially since the stock engine was originally certified on 91/96 Avgas.
Kelly
|
I've never heard of any rule preventing homebuilts from running any fuel they want. No STC is required for a homebuilt. I've run 100LL, 93 E-free mogas, and 93 E-gas in homebuilts, and I know of quite a few others who run all variations too, down to 87 E-gas (in Mazda rotaries). I'm not saying it's smart to run 87 in a 10-1 compression angle valve engine; just that it isn't illegal.
It should be relatively easy to get EAA's opinion; just ask.
Charlie
 Virus-free. www.avast.com [url=#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2] [/url]
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Kellym
Joined: 10 Jan 2006
Posts: 1705
Location: Sun Lakes AZ
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| Posted: Fri Sep 17, 2021 7:30 am Post subject: G100UL |
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I agree with you, although I have heard of FBOs that won't pump into a
tank that doesn't have a placard allowing a specific grade of fuel..easy
to fix with label maker. I would especially look forward to less
maintenance in terms of fouled plugs, oil change intervals, etc.
Kelly
On 9/17/2021 8:08 AM, Charlie England wrote:
| Quote: | >
I've never heard of any rule preventing homebuilts from running any fuel
they want. No STC is required for a homebuilt. I've run 100LL, 93 E-free
mogas, and 93 E-gas in homebuilts, and I know of quite a few others who
run all variations too, down to 87 E-gas (in Mazda rotaries). I'm not
saying it's smart to run 87 in a 10-1 compression angle valve engine;
just that it isn't illegal.
It should be relatively easy to get EAA's opinion; just ask.
Charlie
<https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient&utm_term=icon>
Virus-free. www.avast.com
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Kelly McMullen
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dave(at)corwith.com
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| Posted: Fri Sep 17, 2021 10:38 am Post subject: G100UL |
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Just read the article in AOPA magazine. It states that the stc funds the development. About 1.50$/hp i think. So a one time fee of 400-600$ gets u a sticker. Not sure how expermental fits in Dave
Sent with a Spark
On Sep 17, 2021, 11:07 -0400, Charlie England <ceengland7(at)gmail.com>, wrote: | Quote: | On 9/17/2021 9:17 AM, Kelly McMullen wrote:
| Quote: | Having just watched the AOPA webinar on the implementation of making this fuel available, the one area not addressed is whether amateur built experimental aircraft would need to do any paperwork to use the fuel. Type certificated aircraft will require an STC, just like they do for using mogas. Seems to me that we could just change our fuel placards to read G100UL or 100LL required, and start using it. Would be interesting to get EAA's opinion on this from one of their legal and technical experts. If we don't need anything, it would reduce GAMI's potential income a bit, although they still will get licensing/patent fees anyway.
There is no question in my mind that any IO-540 that is currently installed in a -10 and runs satisfactorily on 100LL will be fine on G100UL.
Especially since the stock engine was originally certified on 91/96 Avgas.
Kelly
|
I've never heard of any rule preventing homebuilts from running any fuel they want. No STC is required for a homebuilt. I've run 100LL, 93 E-free mogas, and 93 E-gas in homebuilts, and I know of quite a few others who run all variations too, down to 87 E-gas (in Mazda rotaries). I'm not saying it's smart to run 87 in a 10-1 compression angle valve engine; just that it isn't illegal. It should be relatively easy to get EAA's opinion; just ask. Charlie Virus-free. www.avast.com [url=#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2][/url]
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Ceengland
Joined: 11 Oct 2020
Posts: 391
Location: MS
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| Posted: Sat Sep 18, 2021 11:04 am Post subject: G100UL |
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Oh, yes! I've been running E-free 93 mogas for over 20 years in 8.5-1 compression Lycs (160 & 180 HP 320s & 360s). Only time I had a problem was with 6 month old 'winter blend' gas (much higher vapor pressure) on a 100+ degree day in a carb'd engine. If it had been injected, I doubt it would have been an issue even then. At annual, you basically look at the plugs & put them back in. Oil stays cleaner looking longer.
I recently switched to 93 E-gas, after several accounts from others who've been running it successfully. The really old mechanical fuel pumps will eventually fail when running E-gas, but according to a tech at the pump mfgr, all their recent production has used E-proof soft parts. Only a few hrs on E-gas, but so far the summer blend seems to run great.
Charlie
On Sat, Sep 18, 2021 at 8:52 AM Kelly McMullen <kellym(at)aviating.com (kellym(at)aviating.com)> wrote:
| Quote: | --> RV10-List message posted by: Kelly McMullen <kellym(at)aviating.com (kellym(at)aviating.com)>
I agree with you, although I have heard of FBOs that won't pump into a
tank that doesn't have a placard allowing a specific grade of fuel..easy
to fix with label maker. I would especially look forward to less
maintenance in terms of fouled plugs, oil change intervals, etc.
Kelly
On 9/17/2021 8:08 AM, Charlie England wrote:
>>
> I've never heard of any rule preventing homebuilts from running any fuel
> they want. No STC is required for a homebuilt. I've run 100LL, 93 E-free
> mogas, and 93 E-gas in homebuilts, and I know of quite a few others who
> run all variations too, down to 87 E-gas (in Mazda rotaries). I'm not
> saying it's smart to run 87 in a 10-1 compression angle valve engine;
> just that it isn't illegal.
>
> It should be relatively easy to get EAA's opinion; just ask.
>
> Charlie
>
> <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient&utm_term=icon>
> Virus-free. www.avast.com
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kilocharlie767(at)gmail.c
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| Posted: Sat Sep 18, 2021 11:45 am Post subject: G100UL |
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Please clarify. I see folks talking about using 93. I assume those folks aren’t talking about using 93 in an IO540? Right?
KC
Sent from KC
| Quote: | On Sep 18, 2021, at 2:09 PM, Charlie England <ceengland7(at)gmail.com> wrote:
Oh, yes! I've been running E-free 93 mogas for over 20 years in 8.5-1 compression Lycs (160 & 180 HP 320s & 360s). Only time I had a problem was with 6 month old 'winter blend' gas (much higher vapor pressure) on a 100+ degree day in a carb'd engine. If it had been injected, I doubt it would have been an issue even then. At annual, you basically look at the plugs & put them back in. Oil stays cleaner looking longer.
I recently switched to 93 E-gas, after several accounts from others who've been running it successfully. The really old mechanical fuel pumps will eventually fail when running E-gas, but according to a tech at the pump mfgr, all their recent production has used E-proof soft parts. Only a few hrs on E-gas, but so far the summer blend seems to run great.
Charlie
On Sat, Sep 18, 2021 at 8:52 AM Kelly McMullen <kellym(at)aviating.com (kellym(at)aviating.com)> wrote:
| Quote: | --> RV10-List message posted by: Kelly McMullen <kellym(at)aviating.com (kellym(at)aviating.com)>
I agree with you, although I have heard of FBOs that won't pump into a
tank that doesn't have a placard allowing a specific grade of fuel..easy
to fix with label maker. I would especially look forward to less
maintenance in terms of fouled plugs, oil change intervals, etc.
Kelly
On 9/17/2021 8:08 AM, Charlie England wrote:
>>
> I've never heard of any rule preventing homebuilts from running any fuel
> they want. No STC is required for a homebuilt. I've run 100LL, 93 E-free
> mogas, and 93 E-gas in homebuilts, and I know of quite a few others who
> run all variations too, down to 87 E-gas (in Mazda rotaries). I'm not
> saying it's smart to run 87 in a 10-1 compression angle valve engine;
> just that it isn't illegal.
>
> It should be relatively easy to get EAA's opinion; just ask.
>
> Charlie
>
> <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient&utm_term=icon>
> Virus-free. www.avast.com
> <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient&utm_term=link>
>
>
> <#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2>
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Kellym
Joined: 10 Jan 2006
Posts: 1705
Location: Sun Lakes AZ
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| Posted: Sat Sep 18, 2021 12:19 pm Post subject: G100UL |
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93 pump octane mogas should be okay in the IO540 if no alcohol, but it
really isn't the same as 91/96 avgas the engine was certified with about
60 years ago. The Swift fuels 94UL avgas should be just fine in an
IO540, but good luck finding it much over 300 miles from their plant in
Indiana.
On 9/18/2021 12:45 PM, Ken Cashwell wrote:
| Quote: | Please clarify. I see folks talking about using 93. I assume those
folks aren’t talking about using 93 in an IO540? Right?
KC
Sent from KC
> On Sep 18, 2021, at 2:09 PM, Charlie England <ceengland7(at)gmail.com> wrote:
>
>
> Oh, yes! I've been running E-free 93 mogas for over 20 years in 8.5-1
> compression Lycs (160 & 180 HP 320s & 360s). Only time I had a problem
> was with 6 month old 'winter blend' gas (much higher vapor pressure)
> on a 100+ degree day in a carb'd engine. If it had been injected, I
> doubt it would have been an issue even then. At annual, you basically
> look at the plugs & put them back in. Oil stays cleaner looking longer.
>
> I recently switched to 93 E-gas, after several accounts from others
> who've been running it successfully. The really old mechanical fuel
> pumps will eventually fail when running E-gas, but according to a tech
> at the pump mfgr, all their recent production has used E-proof soft
> parts. Only a few hrs on E-gas, but so far the summer blend seems to
> run great.
>
> Charlie
>
> On Sat, Sep 18, 2021 at 8:52 AM Kelly McMullen <kellym(at)aviating.com
> <mailto:kellym(at)aviating.com>> wrote:
>
>
> <kellym(at)aviating.com <mailto:kellym(at)aviating.com>>
>
> I agree with you, although I have heard of FBOs that won't pump
> into a
> tank that doesn't have a placard allowing a specific grade of
> fuel..easy
> to fix with label maker. I would especially look forward to less
> maintenance in terms of fouled plugs, oil change intervals, etc.
> Kelly
>
> On 9/17/2021 8:08 AM, Charlie England wrote:
>
> >>
> > I've never heard of any rule preventing homebuilts from running
> any fuel
> > they want. No STC is required for a homebuilt. I've run 100LL,
> 93 E-free
> > mogas, and 93 E-gas in homebuilts, and I know of quite a few
> others who
> > run all variations too, down to 87 E-gas (in Mazda rotaries).
> I'm not
> > saying it's smart to run 87 in a 10-1 compression angle valve
> engine;
> > just that it isn't illegal.
> >
> > It should be relatively easy to get EAA's opinion; just ask.
> >
> > Charlie
> >
> >
> <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient&utm_term=icon
> <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient&utm_term=icon>>
>
> > Virus-free. www.avast.com <http://www.avast.com>
> >
> <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient&utm_term=link
> <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient&utm_term=link>>
>
> >
> >
> > <#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2>
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Kelly McMullen
A&P/IA, EAA Tech Counselor # 5286
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Kellym
Joined: 10 Jan 2006
Posts: 1705
Location: Sun Lakes AZ
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| Posted: Sat Sep 18, 2021 12:28 pm Post subject: G100UL |
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Just so those that run 8.5 compression 4 cylinder Lycomings understand,
the IO-540 is just a 180 hp O/IO-360 with 2 more cylinders. Same
cylinders, same compression, same stroke, same parallel valve
configuration, runs with same fuel requirements. 100LL has always been
more octane than it required, but 91/96 went away before I started
flying 48 years ago.
On 9/18/2021 1:18 PM, Kelly McMullen wrote:
| Quote: | 93 pump octane mogas should be okay in the IO540 if no alcohol, but it
really isn't the same as 91/96 avgas the engine was certified with about
60 years ago. The Swift fuels 94UL avgas should be just fine in an
IO540, but good luck finding it much over 300 miles from their plant in
Indiana.
On 9/18/2021 12:45 PM, Ken Cashwell wrote:
> Please clarify. I see folks talking about using 93. I assume those
> folks aren’t talking about using 93 in an IO540? Right?
>
> KC
|
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http://www.matronics.com/Navigator?RV10-List |
|
_________________
Kelly McMullen
A&P/IA, EAA Tech Counselor # 5286
KCHD |
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Ceengland
Joined: 11 Oct 2020
Posts: 391
Location: MS
|
| Posted: Sat Sep 18, 2021 1:17 pm Post subject: G100UL |
|
|
For me, it's largely a compression & combustion chamber shape thing. The
160 & 180 hp (parallel valve, carb and injected) Lycs are 8.5-1
compression; about as high as I've seen done successfully. The angle valve
200hp 360 is 9-1. *I* would be really leery about running 93 mogas at 9-1
in that IO-360, or the 6cyl using those pistons/cyls. In contrast, modern
automotive engines with sophisticated combustion chamber shapes, knock
detection, computer controlled instant timing retard, etc get away with
much higher compressions on low octane gas. The rotary, with its long
skinny combustion chamber and minimal spark advance, actually prefers the
lowest octane you can find, even at 9-1 compression. If you talk to Ross at
SDS, he might say it's fine to run 93 at 9-1 using his system & appropriate
timing. Or he might not. 
Charlie
On Sat, Sep 18, 2021 at 3:36 PM Kelly McMullen <kellym(at)aviating.com> wrote:
[quote]
93 pump octane mogas should be okay in the IO540 if no alcohol, but it
really isn't the same as 91/96 avgas the engine was certified with about
60 years ago. The Swift fuels 94UL avgas should be just fine in an
IO540, but good luck finding it much over 300 miles from their plant in
Indiana.
On 9/18/2021 12:45 PM, Ken Cashwell wrote:
> Please clarify. I see folks talking about using 93. I assume those
> folks aren’t talking about using 93 in an IO540? Right?
>
> KC
>
> Sent from KC
>
>> On Sep 18, 2021, at 2:09 PM, Charlie England <ceengland7(at)gmail.com>
wrote:
>>
>>
>> Oh, yes! I've been running E-free 93 mogas for over 20 years in 8.5-1
>> compression Lycs (160 & 180 HP 320s & 360s). Only time I had a problem
>> was with 6 month old 'winter blend' gas (much higher vapor pressure)
>> on a 100+ degree day in a carb'd engine. If it had been injected, I
>> doubt it would have been an issue even then. At annual, you basically
>> look at the plugs & put them back in. Oil stays cleaner looking longer
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Kellym
Joined: 10 Jan 2006
Posts: 1705
Location: Sun Lakes AZ
|
| Posted: Sat Sep 18, 2021 2:19 pm Post subject: G100UL |
|
|
The stock 200 hp angle valve engine is 8.7 to 1 compression and yes, it
is a 100LL engine, no mogas is good enough. The 200hp engine originally
had 25 BTDC timing (and some still have it) but the factory now sends
them out with 20 degree timing.
On 9/18/2021 2:17 PM, Charlie England wrote:
| Quote: | For me, it's largely a compression & combustion chamber shape thing. The
160 & 180 hp (parallel valve, carb and injected) Lycs are 8.5-1
compression; about as high as I've seen done successfully. The angle
valve 200hp 360 is 9-1. *I* would be really leery about running 93 mogas
at 9-1 in that IO-360, or the 6cyl using those pistons/cyls. In
contrast, modern automotive engines with sophisticated combustion
chamber shapes, knock detection, computer controlled instant timing
retard, etc get away with much higher compressions on low octane gas.
The rotary, with its long skinny combustion chamber and minimal spark
advance, actually prefers the lowest octane you can find, even at 9-1
compression. If you talk to Ross at SDS, he might say it's fine to run
93 at 9-1 using his system & appropriate timing. Or he might not.
Charlie
On Sat, Sep 18, 2021 at 3:36 PM Kelly McMullen <kellym(at)aviating.com
<mailto:kellym(at)aviating.com>> wrote:
<mailto:kellym(at)aviating.com>>
93 pump octane mogas should be okay in the IO540 if no alcohol, but it
really isn't the same as 91/96 avgas the engine was certified with
about
60 years ago. The Swift fuels 94UL avgas should be just fine in an
IO540, but good luck finding it much over 300 miles from their plant in
Indiana.
On 9/18/2021 12:45 PM, Ken Cashwell wrote:
> Please clarify. I see folks talking about using 93. I assume those
> folks aren’t talking about using 93 in an IO540? Right?
>
> KC
>
> Sent from KC
>
>> On Sep 18, 2021, at 2:09 PM, Charlie England
<ceengland7(at)gmail.com <mailto:ceengland7(at)gmail.com>> wrote:
>>
>>
>> Oh, yes! I've been running E-free 93 mogas for over 20 years in
8.5-1
>> compression Lycs (160 & 180 HP 320s & 360s). Only time I had a
problem
>> was with 6 month old 'winter blend' gas (much higher vapor
pressure)
>> on a 100+ degree day in a carb'd engine. If it had been injected, I
>> doubt it would have been an issue even then. At annual, you
basically
>> look at the plugs & put them back in. Oil stays cleaner looking
longer.
>>
>> I recently switched to 93 E-gas, after several accounts from others
>> who've been running it successfully. The really old mechanical fuel
>> pumps will eventually fail when running E-gas, but according to
a tech
>> at the pump mfgr, all their recent production has used E-proof soft
>> parts. Only a few hrs on E-gas, but so far the summer blend
seems to
>> run great.
>>
>> Charlie
>>
>> On Sat, Sep 18, 2021 at 8:52 AM Kelly McMullen
<kellym(at)aviating.com <mailto:kellym(at)aviating.com>
>> <mailto:kellym(at)aviating.com <mailto:kellym(at)aviating.com>>> wrote:
>>
>>
>> <kellym(at)aviating.com <mailto:kellym(at)aviating.com>
<mailto:kellym(at)aviating.com <mailto:kellym(at)aviating.com>>>
>>
>> I agree with you, although I have heard of FBOs that won't pump
>> into a
>> tank that doesn't have a placard allowing a specific grade of
>> fuel..easy
>> to fix with label maker. I would especially look forward to less
>> maintenance in terms of fouled plugs, oil change intervals, etc.
>> Kelly
>>
>> On 9/17/2021 8:08 AM, Charlie England wrote:
>>
>> >>
>> > I've never heard of any rule preventing homebuilts from
running
>> any fuel
>> > they want. No STC is required for a homebuilt. I've run 100LL,
>> 93 E-free
>> > mogas, and 93 E-gas in homebuilts, and I know of quite a few
>> others who
>> > run all variations too, down to 87 E-gas (in Mazda rotaries).
>> I'm not
>> > saying it's smart to run 87 in a 10-1 compression angle valve
>> engine;
>> > just that it isn't illegal.
>> >
>> > It should be relatively easy to get EAA's opinion; just ask.
>> >
>> > Charlie
>> >
>> >
>>
<https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient&utm_term=icon <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient&utm_term=icon>
>>
<https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient&utm_term=icon <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient&utm_term=icon>>>
>>
>> > Virus-free. www.avast.com <http://www.avast.com>
<http://www.avast.com <http://www.avast.com>>
>> >
>>
<https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient&utm_term=link <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient&utm_term=link>
>>
<https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient&utm_term=link <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient&utm_term=link>>>
>>
>> >
>> >
>> > <#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2>
>> ===========
>> -List" rel="noreferrer"
>> target="_blank">http://www.matronics.com/Navigator?RV10-List
<http://www.matronics.com/Navigator?RV10-List>
>> ===========
>> FORUMS -
>> eferrer" target="_blank">http://forums.matronics.com
<http://forums.matronics.com>
>> ===========
>> WIKI -
>> errer" target="_blank">http://wiki.matronics.com
<http://wiki.matronics.com>
>> ===========
>> b Site -
>> -Matt Dralle, List Admin.
>> rel="noreferrer"
target="_blank">http://www.matronics.com/contribution
<http://www.matronics.com/contribution>
>> ===========
>>
>>
>>
===========
-List" rel="noreferrer"
target="_blank">http://www.matronics.com/Navigator?RV10-List
===========
FORUMS -
eferrer" target="_blank">http://forums.matronics.com
===========
WIKI -
errer" target="_blank">http://wiki.matronics.com
===========
b Site -
-Matt Dralle, List Admin.
rel="noreferrer" target="_blank">http://www.matronics.com/contribution
===========
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Kelly McMullen
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Bob Turner
Joined: 03 Jan 2009
Posts: 885
Location: Castro Valley, CA
|
| Posted: Sat Sep 18, 2021 9:18 pm Post subject: Re: G100UL |
|
|
| Quote: | The Swift fuels 94UL avgas should be just fine in an
IO540, but good luck finding it much over 300 miles from their plant in
Indiana.
|
94UL is now available at KRHV (San Jose, CA)
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ngautier(at)earthlink.net
Guest
|
| Posted: Sun Sep 19, 2021 11:38 am Post subject: G100UL |
|
|
Here is what Lycoming has to say about using gas other than 100LL in IO540s. I think this rev AB version is the latest. Indeed 93AKI, no ethanol, should be fine, with the caveat on vapor pressure
https://www.lycoming.com/service-instruction-no-1070-AB
Nick Gautier
N363TG
Sent from my iPad
| Quote: | On Sep 18, 2021, at 11:51 PM, RV10-List Digest Server <rv10-list(at)matronics.com> wrote:
________________________________ Message 5 _____________________________________
Time: 12:45:31 PM PST US
From: Ken Cashwell <kilocharlie767(at)gmail.com>
Subject: Re: RV10-List: G100UL
Please clarify. I see folks talking about using 93. I assume those folks a
ren=99t talking about using 93 in an IO540? Right?
KC
Sent from KC
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Kellym
Joined: 10 Jan 2006
Posts: 1705
Location: Sun Lakes AZ
|
| Posted: Sun Sep 19, 2021 12:40 pm Post subject: G100UL |
|
|
It will depend on what part of the country you are in. Given the
climate, all summer fuel in AZ is required to be 7.0 RVP for emissions,
which happens to be the same as avgas. Most areas have summer gas below
8.0 RVP, while winter fuel can go as high as 14-15 RVP.
On 9/19/2021 12:38 PM, Thomas Gautier wrote:
| Quote: | Here is what Lycoming has to say about using gas other than 100LL in
IO540s. I think this rev AB version is the latest. Indeed 93AKI, no
ethanol, should be fine, with the caveat on vapor pressure
https://www.lycoming.com/service-instruction-no-1070-AB
<https://www.lycoming.com/service-instruction-no-1070-AB>
Nick Gautier
N363TG
Sent from my iPad
> On Sep 18, 2021, at 11:51 PM, RV10-List Digest Server
> <rv10-list(at)matronics.com> wrote:
>
> ________________________________ Message 5
> _____________________________________
> Time: 12:45:31 PM PST US
> From: Ken Cashwell <kilocharlie767(at)gmail.com>
> Subject: Re: G100UL
>
> Please clarify. I see folks talking about using 93. I assume those
> folks a
> ren=99t talking about using 93 in an IO540? Right?
>
> KC
>
> Sent from KC
|
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