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Av Gas 100LL in small engines and other things

Posted By: earthmover1980

Av Gas 100LL in small engines and other things - 05/22/19 03:11 AM

I have been using 100LL av Gas in my small engines. It is ethanol free, lasts along time, and smells like race fuel. It has been working well for my non-catalyst applications. What are your opinions?
Posted By: wings&wheels

Re: Av Gas 100LL in small engines and other things - 05/22/19 03:20 AM

As long as you don't use synthetic oil, you should be fine....actually, probably be fine even w/ synthetic for limited use in small engines... Plus it lasts much longer than auto fuel.


I've been burning my sump fuel in tractors, etc. as long as I've been flying.
Posted By: das_peikko

Re: Av Gas 100LL in small engines and other things - 05/22/19 04:10 AM

Do they sell it to the general public? You don't have to have an airplane to buy it?
Posted By: tomcat27

Re: Av Gas 100LL in small engines and other things - 05/22/19 06:03 AM

Originally Posted by das_peikko
Do they sell it to the general public? You don't have to have an airplane to buy it?

Nope they sell to anyone. Some are self serve and pay with credit card
Posted By: Cujet

Re: Av Gas 100LL in small engines and other things - 05/22/19 11:20 AM

It works wonderfully. It does have a tendency to dry out the fuel shut off valve seals on some OPE. Other than that, it's stunningly better than pump gas.
Posted By: wag123

Re: Av Gas 100LL in small engines and other things - 05/22/19 11:57 AM

Originally Posted by das_peikko
Do they sell it to the general public? You don't have to have an airplane to buy it?
It depends on the airport, some do and some don't. It isn't illegal for them to sell it to the public and it isn't illegal for the public to use it, so I don't understand why some airports won't sell it to the public. Maybe it is because the airport owners don't want the public out on the tarmac.
AvGas doesn't deteriorate like automotive pump gas so it doesn't need stabilizer. Small engines, boat engines, and vehicles that don't have cats love the stuff!
Posted By: kstanf150

Re: Av Gas 100LL in small engines and other things - 05/22/19 01:50 PM

I’ve never purchased av gas before. What’s the cost per gallon ? And is it leaded or unleaded fuel ?
Posted By: WyrTwister

Re: Av Gas 100LL in small engines and other things - 05/22/19 02:24 PM

What I was wondering , too ?
Posted By: kschachn

Re: Av Gas 100LL in small engines and other things - 05/22/19 02:26 PM

Originally Posted by kstanf150
I’ve never purchased av gas before. What’s the cost per gallon ? And is it leaded or unleaded fuel ?

100LL means 100 octane rating, Low Lead. So yes it is leaded.

And the price is whatever the local FBO can charge for it, which might be quite a bit depending on the location. A lot of them post their prices online.
Posted By: SubieRubyRoo

Re: Av Gas 100LL in small engines and other things - 05/22/19 02:42 PM

Originally Posted by wings&wheels
As long as you don't use synthetic oil, you should be fine....actually, probably be fine even w/ synthetic for limited use in small engines...


Please tell, exactly why would he be fine as long as he doesn't use synthetic oil? How exactly is synthetic oil fine for every other ICE but not for OPE/small engines??
Posted By: chainblu

Re: Av Gas 100LL in small engines and other things - 05/22/19 02:46 PM

Some FBOs are more cooperative than others. Some will want to verify what the fuel is going in. If they have any inking that it is going in a vehicle driven on public roads, they are legally supposed to stop the sale because road taxes have not been collected. The fines to the FBO are pretty hefty and they could possibly lose their license.

This is what I was told some 30 years ago when I inquired about buying AvGas.
Posted By: racin4ds

Re: Av Gas 100LL in small engines and other things - 05/22/19 03:47 PM

Excellent fuel for motorcycles and race karts, we've been using it for years. My son's 2 stroke MX bikes loved the stuff.
Posted By: das_peikko

Re: Av Gas 100LL in small engines and other things - 05/22/19 04:13 PM

Originally Posted by chainblu
Some FBOs are more cooperative than others. Some will want to verify what the fuel is going in. If they have any inking that it is going in a vehicle driven on public roads, they are legally supposed to stop the sale because road taxes have not been collected. The fines to the FBO are pretty hefty and they could possibly lose their license.

This is what I was told some 30 years ago when I inquired about buying AvGas.


If you show up with a 5 gallon gas can and tell them it's for your weedeater, will they have a tendency to believe you?
Posted By: wag123

Re: Av Gas 100LL in small engines and other things - 05/22/19 06:04 PM

Originally Posted by das_peikko
Originally Posted by chainblu
Some FBOs are more cooperative than others. Some will want to verify what the fuel is going in. If they have any inking that it is going in a vehicle driven on public roads, they are legally supposed to stop the sale because road taxes have not been collected. The fines to the FBO are pretty hefty and they could possibly lose their license.
This is what I was told some 30 years ago when I inquired about buying AvGas.

If you show up with a 5 gallon gas can and tell them it's for your weedeater, will they have a tendency to believe you?
5 gal for a weedeater or any other low compression OPE engine will be hard to believe, tell them it is for a dirt bike or old outboard boat engine. Chainblu is correct, never tell them that it is for a car or any other road going vehicle. Ditto 4-wheelers (newer ones have cats on them).
Posted By: kstanf150

Re: Av Gas 100LL in small engines and other things - 05/22/19 06:28 PM

For those like me thats curious about cost check out

www.100ll.com
Posted By: wings&wheels

Re: Av Gas 100LL in small engines and other things - 05/22/19 06:38 PM

Originally Posted by SubieRubyRoo
Originally Posted by wings&wheels
As long as you don't use synthetic oil, you should be fine....actually, probably be fine even w/ synthetic for limited use in small engines...


Please tell, exactly why would he be fine as long as he doesn't use synthetic oil? How exactly is synthetic oil for every other ICE but not for OPE/small engines??


The synthetic oil and heavily leaded fuel is the potential issue. Some synthetic bases, under certain conditions, did not suspend lead adequately. Google Mobil AV1...

The "LL" designates Low Lead, but 100LL still has higher tetraethyl lead levels than auto fuel did.
Posted By: Rick505

Re: Av Gas 100LL in small engines and other things - 05/22/19 08:35 PM

You may be surprised on what aviation fuel costs at your local field:

http://www.airnav.com/fuel/local.html

100LL is showing at $5.59 at the closest airfield but if I drove 40ish miles I can get it for $4.55 a gallon. Not that I really have a need for it.
Posted By: Driz

Re: Av Gas 100LL in small engines and other things - 05/23/19 02:40 AM

The name Low Lead is very misleading. It’s heavily leaded so don’t use it in anything that has a cat . Keep in mind many small engines do the last few years. You sure don’t want that going into one of those so make sure you don’t have one before you use any.
It just loves to leave deposits behind which besides the price was why I almost never used it in my plane., It does store long periods nicely though. You can google around and find a gas prices ( some of them) on the net just like car gas. It doesn’t vary much since there’s not much incentive to compete.
Posted By: racin4ds

Re: Av Gas 100LL in small engines and other things - 05/23/19 02:24 PM

Nice links for the AV gas, thanks fellas. I see it is only $3.94-$3.97 all over my area here in Florida! WaWa is selling junk 87 octane no ethanol for over $3:50!
Posted By: Kamele0N

Re: Av Gas 100LL in small engines and other things - 05/23/19 05:25 PM

2eur +/- per liter over here....

https://www.petrol.eu/companies-and-services/business-solutions/solutions/motor-fuels
Posted By: Rat407

Re: Av Gas 100LL in small engines and other things - 06/04/19 07:01 PM

$4.15 a gallon for 100LL here. Interesting. Might go get some. smile
Posted By: JeepWJ19

Re: Av Gas 100LL in small engines and other things - 06/10/19 09:58 AM

And what is this theoretical benefit over just regular gas?
Posted By: Kamele0N

Re: Av Gas 100LL in small engines and other things - 06/10/19 06:06 PM

That it last longer if stored....
Posted By: wings&wheels

Re: Av Gas 100LL in small engines and other things - 06/10/19 11:16 PM

...and no ethanol. And the exhaust smells better, or maybe I spend too much time around airports.


Seriously, these are the effect of ethanol fuel in the carb bowls from one of my seldom used cars.
[Linked Image]
Posted By: JeepWJ19

Re: Av Gas 100LL in small engines and other things - 06/10/19 11:33 PM

Originally Posted by Kamele0N
That it last longer if stored....


Is it that much more cost efficient/beneficial than using something like stabil when it's time to be stored?
Posted By: JeepWJ19

Re: Av Gas 100LL in small engines and other things - 06/10/19 11:46 PM

Originally Posted by wings&wheels
...and no ethanol. And the exhaust smells better, or maybe I spend too much time around airports.


Seriously, these are the effect of ethanol fuel in the carb bowls from one of my seldom used cars.
[Linked Image]


It'd be cool if you did an experiment using fuel treatment with gas that had ethanol.
Start with top tier fuel then try MMO, Redline SL1, TC-W3 et Al to see if those products help
Posted By: Balrog006

Re: Av Gas 100LL in small engines and other things - 06/11/19 12:47 AM

Originally Posted by Rick505
You may be surprised on what aviation fuel costs at your local field:

http://www.airnav.com/fuel/local.html

100LL is showing at $5.59 at the closest airfield but if I drove 40ish miles I can get it for $4.55 a gallon. Not that I really have a need for it.


40 miles? Nah I’ll pass, my local E0 supply is 75¢ or so above regular unleaded and available with a few miles, works just fine for me.
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