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  #61  
Old 07-28-2021, 02:29 PM
TXFlyGuy TXFlyGuy is offline
 
Join Date: May 2012
Location: Jazz Town, USA, TX
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No thanks, I'll stick with my tried and true 93UL, at $3.30 / gallon.
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  #62  
Old 07-28-2021, 02:59 PM
PhatRV PhatRV is offline
 
Join Date: Mar 2018
Location: Buena Park, California
Posts: 551
Default STC for Non-leaded AvGas

Latest GAMI news from AOPA

https://aopa.org/news-and-media/all-...aded-avgas-stc
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  #63  
Old 07-28-2021, 08:09 PM
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rv6ejguy rv6ejguy is offline
 
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Location: Calgary, Canada
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Quote:
Originally Posted by PhatRV View Post
Good news. Looks like Swift and GAMI are both going the STC route initially at least.
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Turbo Subaru EJ22, SDS EFI, Marcotte M-300, IVO, Shorai- RV6A C-GVZX flying from CYBW since 2003- 449.1 hrs. on the Hobbs,
RV10 95% built- Sold 2016
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  #64  
Old 07-29-2021, 04:24 AM
TXFlyGuy TXFlyGuy is offline
 
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Location: Jazz Town, USA, TX
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At the wholesale level, 85 cents / gallon more than 100LL. So how much will the retailers tack on...another 50 cents? More?

And how many years will it be before this new UL fuel is available at every gas pump, at every airport?

Amazing as many of us can safely get by with 93UL. Not only greater oil change intervals, a cleaner engine, but also $3 to $4 less expensive.

Pardon me if I don't get a warm fuzzy feeling about this. At least not yet.
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  #65  
Old 07-29-2021, 05:47 AM
tgmillso tgmillso is offline
 
Join Date: Nov 2012
Location: Launceston, Tasmania, Australia
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Fear not, Wrights Law will save the day. This rollout is no different from the introduction of electric vehicles. At the start with low volumes, electric vehicles were seen by many as being an unrealistically expensive proposition, and now that they are being made by the millions, their pricing is approaching internal combustion vehicles and will likely reach price parity by 2025.
Initially this fuel will be taken up by those who think it is important and are prepared to pay a premium, but as the production volumes increase you can be assured that this will be available at pricing equal or below that of leaded aviation fuel due to the savings associated with not having to handle the fuel in dedicated lead-only infrastructure.

Tom.
RV-7, that only drinks unleaded fuel.
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  #66  
Old 07-29-2021, 05:59 AM
PhatRV PhatRV is offline
 
Join Date: Mar 2018
Location: Buena Park, California
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Quote:
Originally Posted by TXFlyGuy View Post
At the wholesale level, 85 cents / gallon more than 100LL. So how much will the retailers tack on...another 50 cents? More?

And how many years will it be before this new UL fuel is available at every gas pump, at every airport?

Amazing as many of us can safely get by with 93UL. Not only greater oil change intervals, a cleaner engine, but also $3 to $4 less expensive.

Pardon me if I don't get a warm fuzzy feeling about this. At least not yet.
I think we in the EAB fleet can fill up with any type of high octane UL fuel we like. The certified world can only use the STC fuel if 100LL is no longer available. Every parallel valve engine from the Vans OEM is approved for UL fuel operation directly from Lycoming.
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Firewall Forward -- Cowl completed. Baffle 90%
Electrical -- 90%

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  #67  
Old 07-29-2021, 06:26 AM
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rv8ch rv8ch is online now
 
Join Date: Feb 2005
Location: LSGY
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Hopefully a massive switch to unleaded will quickly happen across the entire GA fleet. This is good news for everyone who likes to fly, since it can't be good for us to be seen as spraying lead across the countryside when we fly - even if some of us are already running unleaded.

From what I've understood George Braly to say, there will be STCs for a few months, and then the FAA will approve it generally for all piston aircraft. Sure hope this happens!
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  #68  
Old 07-29-2021, 06:48 AM
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rv6ejguy rv6ejguy is offline
 
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It's an important first step to get the ball rolling. Now it may be a battle between Swift and GAMI formulations and who can produce and distribute enough of it.
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Ross Farnham, Calgary, Alberta
Turbo Subaru EJ22, SDS EFI, Marcotte M-300, IVO, Shorai- RV6A C-GVZX flying from CYBW since 2003- 449.1 hrs. on the Hobbs,
RV10 95% built- Sold 2016
http://www.sdsefi.com/aircraft.html
https://www.youtube.com/channel/UCiy...g2GvQfelECCGoQ


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  #69  
Old 07-29-2021, 04:40 PM
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rv6ejguy rv6ejguy is offline
 
Join Date: Mar 2005
Location: Calgary, Canada
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As stated in the AOPA article, It seems GAMI already has many test cell hours running on a turbo Lycoming. If I read the article right, they are hoping with a bunch of real world experience with the fuel released to STC'd users, that the FAA may open things up more in the future.

Too soon to tell if that's the case. Maybe they need to get some Experimental turbocharged engine users to be filling up with this fuel for a couple years and reporting carefully documented results.

I'd be willing to test if they sent a few barrels up to me...
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Ross Farnham, Calgary, Alberta
Turbo Subaru EJ22, SDS EFI, Marcotte M-300, IVO, Shorai- RV6A C-GVZX flying from CYBW since 2003- 449.1 hrs. on the Hobbs,
RV10 95% built- Sold 2016
http://www.sdsefi.com/aircraft.html
https://www.youtube.com/channel/UCiy...g2GvQfelECCGoQ


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  #70  
Old 07-29-2021, 06:48 PM
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rjcthree rjcthree is offline
 
Join Date: Jan 2007
Location: Bay Village, OH
Posts: 982
Default Reduced timing?

Ross, early in the thread (post #6) you mention mid-CR engines running mogas with reduced high MAP timing. As my engine, like many others, approaches 9:1 CR (Iíve got a stock longblock O-320H2 at 8.9:1) and is not in SI-1070 to run UL, Iím curious to get your opinion on what the reduction in advance is from baseline. Is it 5*? More? Iím running a CPI2. Thanks.
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