Project Farm fuel stabilizer after 5yrs.

[repairman54]

PRI-G is all I use. I have saws that can sit a long time without use for example.
I've had issues with Stabil in any flavor in the past. No impressed with it at all. Seafoam is hard on plastic and rubber so I don't use it for storage.

 

[SumGuy]

I had a car in storage for 20 years ('67 Dodge) that I finally got around to giving some TLC to in the fall of 2022. There was gas in the tank when stored, a small leak that over time left a dark tar-like sludge that I had to scrape off the cement floor. But not all of it leaked, but the storage unit and the gas in the tank smelled like turpentine.

The car now has a new tank, I soldered a drain port to the bottom of it before installing. I will drain the tank and then run the engine until the carb runs dry for winter storage. Might even try to fill the tank with CO2 from a welding tank or air from a hair dryer to dry it up the inside.

I'm not a believer in storing a car with a full tank of gas, I just don't trust it nor the additives to not mess (destroy) the exposed metal or the sending unit. I can't buy non-ethanol gas where I am, so there's also that.

 

[SumGuy]

I still want to know what exactly do they put in gasoline, even non-ethanol gasoline, that makes it go bad over time.

I can have cans of acetone or varsol or lacquer thinner that last for years, that stuff does not go bad over time. Why should gasoline? Do "they" not want us civillians to have the abilty to store fuel indefinately?

Does jet or aviation fuel go bad over time? As fast as consumer/retail gasoline?

 

[KnappAttak]

I still want to know what exactly do they put in gasoline, even non-ethanol gasoline, that makes it go bad over time.

I can have cans of acetone or varsol or lacquer thinner that last for years, that stuff does not go bad over time. Why should gasoline? Do "they" not want us civillians to have the abilty to store fuel indefinately?

Does jet or aviation fuel go bad over time? As fast as consumer/retail gasoline?

Av gas does not go bad like auto fuel if left in storage. 100LL is 100 octane low lead with no ethanol. It's stay good for a long time.

Jet fuel is not gasoline, but more like a Kerosene or Diesel Fuel.

 

[RazorsEdge]

Never messed with stabilizers. I just pour in trufuel and wait til Spring.

 

[ryanschillinger]

I’ve been using stabil marine 360 for several years now and it seems to have eliminated fuel system issues especially on the motorcycle and small engine stuff that sits a lot. It’s a good value buying the 32oz bottle on Amazon.

 

[SOUNDMAN5000]

I have had great luck with Sta-bil as I have used it in almost EVERY tank of gas ( I run a Marvel Mystery Oil AND Sta-bil mix ) in my old 1997 Harley has and ALL my 20+ year old lawn mowers.

I have never used PRI-G but I like what I see and the idea it may refresh older gas is cool. its expensive but if its better than Sta-bil I may would use it. I need the "lube" in the gas I get with also mixing in some Marvel and I know i'm okay mixing MMO with Sta-bil, I have no idea IF PRI-G can be mixed safely together with MMO?

 

[97prizm]

I had a car in storage for 20 years ('67 Dodge) that I finally got around to giving some TLC to in the fall of 2022. There was gas in the tank when stored, a small leak that over time left a dark tar-like sludge that I had to scrape off the cement floor. But not all of it leaked, but the storage unit and the gas in the tank smelled like turpentine.

The car now has a new tank, I soldered a drain port to the bottom of it before installing. I will drain the tank and then run the engine until the carb runs dry for winter storage. Might even try to fill the tank with CO2 from a welding tank or air from a hair dryer to dry it up the inside.

I'm not a believer in storing a car with a full tank of gas, I just don't trust it nor the additives to not mess (destroy) the exposed metal or the sending unit. I can't buy non-ethanol gas where I am, so there's also that.

Can you buy avgas or mogas? Severall classic car museums said they store the tanks with avgas as it doesn't deteriorate like automotive gas.

 

[Surestick]

I still want to know what exactly do they put in gasoline, even non-ethanol gasoline, that makes it go bad over time.

I can have cans of acetone or varsol or lacquer thinner that last for years, that stuff does not go bad over time. Why should gasoline? Do "they" not want us civillians to have the abilty to store fuel indefinately?

Does jet or aviation fuel go bad over time? As fast as consumer/retail gasoline?

It's not something they put in it, it's what leaves.
Liquid fuel doesn't burn, its vapour does.
Gasoline is a mix of various chemicals, some have a lower vapour pressure and evaporate fairly easily, others have a higher vapour pressure. Winter fuel for example has more of the lower vapour pressure parts to help it evaporate more readily and help with cold starts.
As gas sits the lower vapour pressure parts of the fuel evaporate. Eventually you end up with fuel that won't evaporate fast enough when released into the intake, be that by carb or by fuel injector, and the engine won't run.
There are also chemical reactions with the air that occur slowly over time and moisture ending up in the tank that cause issues. Ethanol tends to absorb moisture so it exacerbates this.

Look at the Chevy Volt, it had a stainless steel fuel tank that was airtight and could withstand a bit of pressure differential with the outside in order to keep it's fuel fresh for longer if it wasn't using the ICE frequently. Even then it would automatically run the ICE occasionally to burn through the fuel and circulate oil through the engine.

You could probably run an engine on old fuel if you heated it to the point it would evaporate like the F1 turbo engines had to do in the 80's when they were using Toluene as fuel for its high octane.

Jet fuel is basically kerosene and similar to diesel. It doesn't go bad as fast, they can suffer from algae growth and algaecides have to be added to it if it's stored for long.

Aviation fuel tends to last a bit longer too, no ethanol helps and the fuel is blended to last longer. You do have to drain water from the tanks prior to flying though, it's surprising how much water can end up in a fuel system.

 

[SumGuy]

It's not something they put in it, it's what leaves.

No, I think it's what they put in. Various oxygenates that are there because of environmental regulations. Stuff they weren't putting in gas 30, 50 years ago. That's the stuff that turns today's gas rancid. That and the ethanol. They say that av-gas (not talking about jet fuel here) has a much longer shelf life.

 

[nickaluch]

I use tru fuel in my yard equipment only about two can a season my lawnmower no stabilizer just run dry and of season no issues

 

[jtwrace]

I just started my 1984 Honda 200s that has been sitting for 25 yrs with the same gas in it that was treated with Sta-Bil. Fired right up!

 

[93regalcustom]

I bought five gallons of Rec90 fuel in January 2024 and put half in a metal can with Techron powersports stabilizer and half with some mercury quicksilver fuel stabilizer and have been using the cans in OPE. I have not had either batch go bad. I just ran and changed the oil in the mower and the pressure washer and both are running perfectly with the Mercury-treated fuel. How much of this is the product and how much is the ethanol free fuel, I don’t know. I can say both fuels are working great.