AVGAS 80 & MOGAS

My C150M POH shows an approved fuel grade includes AVGAS 80.

Assuming you could find 80, how safe is it to run?

And, what are the modifications made to the fuel system to run MOGAS?

On a purely theoretical level, what would be the ramifications of fueling
up an unmodified Cessna 150 with 92 octane MOGAS?


--
Dallas

On Oct 29, 1:42 pm, Dallas wrote:
My C150M POH shows an approved fuel grade includes AVGAS 80.

Assuming you could find 80, how safe is it to run?

And, what are the modifications made to the fuel system to run MOGAS?

On a purely theoretical level, what would be the ramifications of fueling
up an unmodified Cessna 150 with 92 octane MOGAS?

--
Dallas

Depending on where you live MOGAS may not be approved. Only certain
blends of MOGAS are approved by the FAA and many communities restrict
those blends. .
When I had the Aeronica I found the engine ran much cleaner on 80. It
burns a bit hotter so you get less deposits. The only reason 80 isn't
the preferred gas around the world is because higher compression
engines need the 100.

-Robert

Dallas wrote:
My C150M POH shows an approved fuel grade includes AVGAS 80.

Assuming you could find 80, how safe is it to run?

And, what are the modifications made to the fuel system to run MOGAS?

On a purely theoretical level, what would be the ramifications of
fueling up an unmodified Cessna 150 with 92 octane MOGAS?

Here's some info on a auto fuel STC.

http://autofuelstc.com

You need an STC. I have the EAA one. Just go to their web page. You
can actually burn 87 octone fine on your O200 just make sure it does not
have ethanol in it. Cessna Pilots Associate actually recommends a
mixture of 100LL and AvGas for O200 and O300 engines after break in as
it better approximates the 80 Octane these engines were designed for
that the 100LL you are probably using. It will reduce your fowling
problems and stuck valves, and you won't need to run MMO.

Helen

Dallas wrote:
My C150M POH shows an approved fuel grade includes AVGAS 80.

Assuming you could find 80, how safe is it to run?

And, what are the modifications made to the fuel system to run MOGAS?

On a purely theoretical level, what would be the ramifications of fueling
up an unmodified Cessna 150 with 92 octane MOGAS?

On Mon, 29 Oct 2007 20:44:44 -0000, Robert M. Gary wrote:

When I had the Aeronica I found the engine ran much cleaner on 80.

A little research on my own dispelled my incorrect belief that the octane
rating had something to do with the potential power of fuel.

As it turns out, 80 is a pretty good fuel for low compression engines.

Another myth busted.

--
Dallas

On Mon, 29 Oct 2007 16:47:10 -0500, Gig 601XL Builder wrote:

Here's some info on a auto fuel STC.
http://autofuelstc.com

Very informative... thanks.

--
Dallas

Dallas wrote:
My C150M POH shows an approved fuel grade includes AVGAS 80.

Assuming you could find 80, how safe is it to run?

And, what are the modifications made to the fuel system to run MOGAS?

On a purely theoretical level, what would be the ramifications of fueling
up an unmodified Cessna 150 with 92 octane MOGAS?


Low compression engines work well on 80 octane. The problem with 100LL
is that you don't need the extra octane (does nothing for you) but you
also don't want all the extra lead. 100LL is only "low" in lead
compared to the old 100/130 fuel it replaced. It has 4 times the lead
that 80 did and way more than premium auto gas ever did.

The only problem is the corn lobby is making it pretty darned difficult
to find autofuel without ethanol in it and ethanol is not approved for
the autofuel STC's (and it plays hell on us boaters too!)

On Oct 29, 6:31 pm, Helen wrote:
You need an STC. I have the EAA one.

I used to too. However, do you find many places that still has legal
autogas? In California it seems all the gas has the prohibited
ethanol. With the liberal states requiring ethanol to starve the
Mexicans from their tortillas and the midwester states requiring it to
boast their own pockets it doesn't seem like anyone is left with old
fashion, FAA approved, mogas.

-Robert

I used to too. However, do you find many places that still has legal
autogas? In California it seems all the gas has the prohibited
ethanol. With the liberal states requiring ethanol to starve the
Mexicans from their tortillas and the midwester states requiring it to
boast their own pockets it doesn't seem like anyone is left with old
fashion, FAA approved, mogas.

No problem getting unpolluted, ethanol free gas here in Iowa,
ironically the source of most ethanol.

Mary and I are about to pass 9,000 gallons of trouble-free mogas usage
in our Cherokee(s), all dispensed from our Mighty Grape fuel hauler.
At the current price differential of $2.25+ per gallon, using mogas
will have paid for my next engine...
--
Jay Honeck
Iowa City, IA
Pathfinder N56993
www.AlexisParkInn.com
"Your Aviation Destination"

----- Original Message -----
From: "Jay Honeck"
Newsgroups: rec.aviation.piloting
Sent: Tuesday, October 30, 2007 10:22 AM
Subject: AVGAS 80 & MOGAS



No problem getting unpolluted, ethanol free gas here in Iowa,
ironically the source of most ethanol.



Yep.....Jay, every time I think about the corn states exporting their lousy
fuel to other states, and not using it locally, it tics me off. I put over
1500 hours on a Lyc with a Peterson STC, and that was the best fuel for that
engine.....bar none. The plugs were clean, the oil remained clean 2-3 times
longer etc. But alas....now mogas in our area all has alcohol, so now I
clean plugs and change oil more often......and of course pay the higher
price for 100LL. Oh well...

John Severyn
@KLVK Livermore, Ca.