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Tool Talk Discussion Forum

gasoline stabilizer

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robert1

01-25-2005 16:38:34




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I add stabilizer to the fuel in all of my lawn equipment that sits all winter. I've been afraid not to use it but how does it work? What does it do to the fuel to keep it "fresh"? This is sort of a tool in a bottle question. Thanks.




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David - OR

01-28-2005 07:49:39




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 Re: gasoline stabilizer in reply to robert1, 01-25-2005 16:38:34  
The active ingredient in products like StaBil is BHT (butylated hydroxytoluene). It is an anti-oxidant, the same stuff used in baked goods to keep shortening from going rancid. Mixed with gasoline, the BHT retards the reaction rate between the hydrocarbons in gasoline and oxygen in the ambient air.

There are some "health nuts" that feel that BHT helps to keep people from "going rancid". In fact, you can buy BHT in bulk from stores that cater to these folks.

It would not be too difficult to make your own "Stabil" from BHT and a suitable solvent like kerosene.

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Nolan

01-27-2005 06:06:02




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 Re: gasoline stabilizer in reply to robert1, 01-25-2005 16:38:34  
In reading the MSDS of various ones, it appears they are basically a solvent. This would help keep the heavier portions of gasoline from coming together (forming gum and the like) as the gasoline sat.



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JT

01-26-2005 06:22:46




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 Re: gasoline stabilizer in reply to robert1, 01-25-2005 16:38:34  
Basically todays fuel is about 60% flammmable product and the rest is by products(for lack of other words). Fuel stabilizer keeps the flammable products from evaporating and leaving all the residue in your fuel that is not gas. If you think what I am telling and what buickanddeere says is misleading, 20 years ago fuel stabilizers were a new,novel concept, really did not need them, but you got good quality fuel, so it was not needed.

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buickanddeere

01-25-2005 20:24:05




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 Re: gasoline stabilizer in reply to robert1, 01-25-2005 16:38:34  
You can use aviation fuel and not bother with stabilizers trying to make pump gas something that it isn't. Take two identical open top cans and fill one with AV gas and the other with any automotive gasoline of your choice. Set them out in the sun for a week, then take a look. The aviation fuel will have evaporated away with little to no trace of it ever have being there. The auto gas will still have some "fuel" in the bottom of the can and it's turning into gum & varnish. Or you can just drain the tank or shut the gas tank isolation valve. Then run the engine until all the fuel is used out of the carb.

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Mike M

01-26-2005 06:42:33




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 Re: gasoline stabilizer in reply to buickanddeere, 01-25-2005 20:24:05  
Have you had any problems with AV gas running hotter ? I talked to a fellow who was running it in his old Caddy and he quit using it full strength because his exhaust manifolds were turning white. I think he blends it now. He can get it easy as he does sky diving I think the average joe would have trouble buying it.



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lucasss

01-26-2005 07:04:11




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 Re: gasoline stabilizer in reply to Mike M, 01-26-2005 06:42:33  
its majic i think. computerized cars arent programed for aviation gas.



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Mike M

01-26-2005 07:43:45




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 Re: gasoline stabilizer in reply to lucasss, 01-26-2005 07:04:11  
His old Caddy is around a 1968.



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buickanddeere

01-26-2005 09:04:53




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 Re: gasoline stabilizer in reply to Mike M, 01-26-2005 07:43:45  
Unless you can find find unleaded AV gas the O2 sensors and CAT convertors will fail leaving you with poor running fuel hog.
The topic here was a small engine that may sit for months between use but maybe required on a moments notice.E:G a generator.
As for running hotter..... ..... . Well now the hot dog driver has confidence in the machine now that it's fuel with detonation resistant AV gas.
The machine will see more wide open throttle and for longer duration than ever before. Either because it's not knocking now or the driver feels invincable.
Of course it's going to found running hotter than ever before.

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Fred OH

01-27-2005 05:36:15




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 Re: gasoline stabilizer in reply to buickanddeere, 01-26-2005 09:04:53  
B&D...I once got a decent old riding lawnmower that I gave a tune up and a belt or two and it ran good enough to put to use. I filled it up with gas (ten HP Briggs engine) and it commenced to run awful and couldn"t be adjusted out. Right before wits end I started checking other things out and found that I had put high test gas in it...drained it out and refilled with regular and it ran good again. I haven"t used av gas but it is 100+ octane...can be purchased at local drag strips and small airports. I wonder if it would run right in small engines? Fred OH

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buickanddeere

01-27-2005 06:39:46




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 Re: gasoline stabilizer in reply to Fred OH, 01-27-2005 05:36:15  
Sometimes at larger airports they carry more than Jet A-1 and 100LL. Can't think of the exact numbers right now but it's the low octane cheapo stuff for low compression airraft.



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Fred OH

01-27-2005 13:58:28




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 Re: gasoline stabilizer in reply to buickanddeere, 01-27-2005 06:39:46  
I was with a friend a couple of years ago and he bought some av gas for his Camaro race car and as I recall...it was over $4.00 a gallon. Fred OH



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buickanddeere

01-27-2005 22:37:05




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 Re: gasoline stabilizer in reply to Fred OH, 01-27-2005 13:58:28  
For a while last summer it was 2 cents a liter cheaper to purchase 100LL at the airport than 94 octane in town. 93 cents a squirt.



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