Go Back   The Ford Barn > General Discussion > Early V8 (1932-53)

Sponsored Links (Register now to hide all advertisements)

Reply
 
Thread Tools Display Modes
Old 09-26-2020, 05:38 PM   #1
oldskool
Senior Member
 
oldskool's Avatar
 
Join Date: May 2010
Location: shirley ny
Posts: 913
Default aviation gas

has anyone used aviation gas in a flathead ,some of my street rod friends use it especially when storing the car over the winter, im told it contains no ethanol.
oldskool is offline   Reply With Quote
Old 09-26-2020, 06:35 PM   #2
HDowse
Senior Member
 
HDowse's Avatar
 
Join Date: May 2010
Location: Hancock, New Hampshire
Posts: 252
Default Re: aviation gas

We use it in our small tools in the fire department just for the reason that it doesn’t deteriorate as fast as auto gas. The octane is 100 and others may comment on any effect that might have on timing needs, if any. We’ve also used it in the department's antique 1945 Mack pumper with good results. No, it’s not a front line piece.....;-)
HDowse is offline   Reply With Quote
Sponsored Links (Register now to hide all advertisements)
Old 09-26-2020, 06:39 PM   #3
JSeery
Senior Member
 
JSeery's Avatar
 
Join Date: Nov 2012
Location: Wichita KS
Posts: 15,313
Default Re: aviation gas

Octane rating is way more than a normal street flathead. A high CR OHV engine might benefit. Non-ethoanol fuel should be available most everywhere. Marine usage, farm usage, etc.
JSeery is online now   Reply With Quote
Old 09-26-2020, 07:36 PM   #4
Angledrive
Senior Member
 
Angledrive's Avatar
 
Join Date: May 2010
Location: Lakeland Florida
Posts: 217
Default Re: aviation gas

Use it all the time, very good for vehicles stored any length of time.
Angledrive is offline   Reply With Quote
Old 09-26-2020, 07:43 PM   #5
russcc
Senior Member
 
Join Date: May 2010
Posts: 2,436
Default Re: aviation gas

You can get at your local airport, we have 94 & 100 octane. I use the 94 in all my small equipment, and run it in the Hot Rod around the time to stow if for the winter. No ethanol, superior preservation additives. Think about, a small airplane probably see a lot less use than our cars, so do you want it crapping out from junk gas while you are taking off or in flight. You can also buy the higher octane no ethanol gas in gallon, and 5 gallons cans for small fortune if you have the money, and airport. The current price in my area for 94 AVG is about $7.00 a gallon.
russcc is offline   Reply With Quote
Old 09-26-2020, 08:28 PM   #6
Pete
Senior Member
 
Pete's Avatar
 
Join Date: May 2010
Location: Wa.
Posts: 3,905
Default Re: aviation gas

Sponsored Links (Register now to hide all advertisements)
I used it for many years in the race car when we ran street class. The good old purple 115/145 was available then.
For street you won't have to tune any different unless you want. It will stand more spark advance so you might gain some mileage there. It has about 4 cc's per gallon of tetraethyl lead so you may have to open the plug gaps slightly to forestall leading.
On air cooled engines such as mowers and trimmer's etc. with 4 cycle engines, you may encounter sticking valves over time, due to the lead. In the old days, they set the stem clearance wider.

100LL is around $5 a gallon here now.
Pete is offline   Reply With Quote
Old 09-26-2020, 10:39 PM   #7
GB SISSON
Senior Member
 
GB SISSON's Avatar
 
Join Date: Jan 2014
Location: Orcas Island Washington
Posts: 2,679
Default Re: aviation gas

A friend who is an airplane mechanic said that if you evaporate a gallon of it in a stainless steel bowl, there is a very faint white residue if anything left over. His side passion is vintage motorcycles, so it matters.
__________________
'47 1/2 ton pickup next project, '47 one ton panel 99% stock nearing completion, '47 2 ton with 8ba and 9' script stakebed, '46 1/2 ton woodie project,'59 F350 9' flareside pickup with cummins 6at. 'Rusty ol' floorboards, hot on their feet' (Alan Jackson)
GB SISSON is offline   Reply With Quote
Old 09-26-2020, 10:43 PM   #8
35fordtn
Senior Member
 
35fordtn's Avatar
 
Join Date: Aug 2010
Location: McMinnville, TN
Posts: 1,923
Default Re: aviation gas

I am fortunate to be in a small town 2 miles from the local airport. They let me pull onto the runway and fill up. I prefer running 100LL AvGas in my cars. I have the timing advanced 2 degrees to compensate for the higher octane. AvGas seems to have a MUCH longer life for storage, and is MUCH less prone to vapor lock
35fordtn is offline   Reply With Quote
Old 09-26-2020, 11:21 PM   #9
JSeery
Senior Member
 
JSeery's Avatar
 
Join Date: Nov 2012
Location: Wichita KS
Posts: 15,313
Default Re: aviation gas

Quote:
Originally Posted by 35fordtn View Post
I am fortunate to be in a small town 2 miles from the local airport. They let me pull onto the runway and fill up. I prefer running 100LL AvGas in my cars. I have the timing advanced 2 degrees to compensate for the higher octane. AvGas seems to have a MUCH longer life for storage, and is MUCH less prone to vapor lock
That would be true, has to work at altitude.
JSeery is online now   Reply With Quote
Old 09-27-2020, 06:52 AM   #10
mfirth
Senior Member
 
Join Date: Aug 2017
Location: ohio
Posts: 484
Default Re: aviation gas

Too pricey for me. 93 oct & Sta-bil has worked just fine for winter storage. I run 89 oct during "the season" and have no problems with good performance.
mfirth is offline   Reply With Quote
Old 09-27-2020, 08:37 AM   #11
oldskool
Senior Member
 
oldskool's Avatar
 
Join Date: May 2010
Location: shirley ny
Posts: 913
Default Re: aviation gas

airport 1 mile away from me current price for 100LL is 4.75 i will give it a try except for price looks like it has its advantages
oldskool is offline   Reply With Quote
Old 09-27-2020, 10:10 AM   #12
Ol' Ron
Senior Member
 
Ol' Ron's Avatar
 
Join Date: May 2010
Location: Chester Vt
Posts: 7,664
Default Re: aviation gas

100LL, has 4 times the amount of TEL in it than standard leaded gas. And i wouldn't run it in anything. In my friends 182 we had an STC for auto fuel and ran 87 pump gas. This was before they started putting alcohol in. We're lucky her in VT as 91 Oct doesn't have Alcohol it it.
Gramps
Ol' Ron is offline   Reply With Quote
Old 09-27-2020, 11:39 AM   #13
rotorwrench
Senior Member
 
rotorwrench's Avatar
 
Join Date: Jun 2010
Location: San Antonio, Texas
Posts: 12,059
Default Re: aviation gas

The Suplemental Type Certificate is still valid but a person has to purchase alcohol free auto gas to use it. The web site has the link to the stations around the country that are known to be alcohol free. Obviously, vapor pressure is very important for aircraft use. A person doesn't need vapor lock at altitude. The old engines that used 80/87 work just fine with the STC mogas as long as they follow the directions.

One of the helicpters I maintain has the HIO-360-D1A engine that has 10:1 compression. It was originally designated to use 100/130 green avgas but that stuff is almost non existant now days. The 100LL has a blend with a lower amount of Tetraethyl Lead (1.2 to 2 grams per gallon) but it still has a lot of TEL in there as was mentioned. It is actually blended in at a guaranteed level not to go below the lower amount specified for 100LL but is can have more and does vary in content within the range. My customers have gotten batches that caused lead fowling of the spark plugs so I know it is sometimes more than just minimum in there and may exceed 2 grams per gallon. Mogas never had as much TEL as 100LL for street use. Now days leaded auto gas is generally only used for racing or other off road use since no road taxes are added.

There are fuel police down here in Texas that keep an eye out for farm diesel being used on the street. They mostly just check diesel vehicles on a spot check basis but there is a possibility that they could catch a person using avgas too. It's not legal to use avgas on the street. You can carry it legally on the street in a properly marked tanks or containers but that's about it.
rotorwrench is offline   Reply With Quote
Old 09-27-2020, 01:30 PM   #14
mrtexas
Senior Member
 
mrtexas's Avatar
 
Join Date: May 2010
Location: Sugar Land, TX
Posts: 4,285
Default Re: aviation gas

You might not know it but the octane method for avgas is different so octane comparison is apples and oranges. However avgas is almost 100% iso-octane with butane added for vapor pressure.
__________________
Palindromes:
Do geese see God?
Was it a car or a cat I saw?
Won't Neil call a Walla Walla client now?
Dr. Gong! Get ale to my motel at Egg-nog Rd!

41 woodie https://41fordwoodie.weebly.com/
mrtexas is offline   Reply With Quote
Old 09-27-2020, 02:24 PM   #15
Hal Beatty
Senior Member
 
Hal Beatty's Avatar
 
Join Date: Jul 2012
Location: Bellingham, WA
Posts: 168
Default Re: aviation gas

When I was involved with the museum and had airport access I would use 100LL in my roadster for winter storage with no issues. I've run and flown in aircraft with 3 or 4 year old avgas in the tanks many times and have some 5 year old avgas/oil mixed for my chain saw. Used it the other day and it started on the 3rd or 4th pull after sitting for 6 months...
Hal Beatty is offline   Reply With Quote
Old 09-27-2020, 05:08 PM   #16
meric42
Senior Member
 
meric42's Avatar
 
Join Date: Aug 2010
Location: Blenheim, New Zealand
Posts: 743
Default Re: aviation gas

I would mix 20% with regular gas for long trips in my '42 Staff Car ('G' series Six cylinder) and boy it seemed to run better and sound better too.
__________________
I need an 01A 1453 Brkt Spare wheel hold down for my sedan delivery - PLEASE HELP

Gotta love my '42 Sedan Delivery's - Now that I own the only two in New Zealand

http://www.fordbarn.com/forum/album.php?albumid=580
meric42 is online now   Reply With Quote
Old 09-27-2020, 08:34 PM   #17
Tim Ayers
Senior Member
 
Join Date: May 2010
Location: NJ
Posts: 3,875
Default Re: aviation gas

Curious, what is mogas?
Tim Ayers is offline   Reply With Quote
Old 09-27-2020, 08:44 PM   #18
Pete
Senior Member
 
Pete's Avatar
 
Join Date: May 2010
Location: Wa.
Posts: 3,905
Default Re: aviation gas

Quote:
Originally Posted by Tim Ayers View Post
Curious, what is mogas?
When you eat beans, you get mogas.......lol
Pete is offline   Reply With Quote
Old 09-27-2020, 08:55 PM   #19
Tim Ayers
Senior Member
 
Join Date: May 2010
Location: NJ
Posts: 3,875
Default Re: aviation gas

Quote:
Originally Posted by Pete View Post
When you eat beans, you get mogas.......lol
Haha. Good one, Pete.
Tim Ayers is offline   Reply With Quote
Old 09-27-2020, 11:03 PM   #20
V8COOPMAN
Senior Member
 
V8COOPMAN's Avatar
 
Join Date: May 2010
Location: East Shore of LAKE HOUSTON
Posts: 7,292
Default Re: aviation gas

Quote:
Originally Posted by Tim Ayers View Post
Curious, what is mogas?
'Mogas' is generally recognized as "automotive-grade" gasoline. DD
__________________
T5 W/TORQUE TUBE

One thing you learn from history....is that nobody learns from history!
V8COOPMAN is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Sponsored Links (Register now to hide all advertisements)


All times are GMT -5. The time now is 02:42 PM.