Gasoline stabilizer??

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whitesik
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Gasoline stabilizer??

Post by whitesik » Mon Jun 15, 2020 1:59 pm

Based on readings here about potential adverse effects of ethanol on older engine components, I have been using ethanol free gasoline in my 710k whenever possible. Recently I was able to acquire a 300 gallon storage tank for ethanol free gasoline to use in my Pinz and other small engines. But, not knowing how quickly I will use it, I feel I need to put a stabilizer in it such as Stabil or other brands. I am asking if this will negate my decision to use ethanol free gasoline and thus fooling myself that I am doing something good for my engine. Seafoam will stabilize gasoline but that gets costly to preserve 300 gallons. Thanks!!
75 Swiss 710K
Not so new owner but still a novice

whitesik
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Posts: 163
Joined: Thu Apr 02, 2015 2:11 pm
Location: Indiana, U.S.A.

Re: Gasoline stabilizer??

Post by whitesik » Fri Jun 19, 2020 7:03 am

What? 86 views and no input? Was it a stupid question?
Thanks!
75 Swiss 710K
Not so new owner but still a novice

pinzinator
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Location: Indio, California

Re: Gasoline stabilizer??

Post by pinzinator » Fri Jun 19, 2020 8:18 am

I would suggest adding StaBil. 300 gallons is a sizable investment, the cost of a few bottles to endure that it will last is not much money. Find a way to stir it up after adding.

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rmel
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Re: Gasoline stabilizer??

Post by rmel » Fri Jun 19, 2020 8:46 am

Irrespective of Ethanol free or not, fuel is highly volatile with components
with a large range of vapor pressure. Fuel will degrade through evaporation
with the higher volatiles boiling off first, then some bonding can occur creating
a gum .... So treat but rotate !! Rotate your stock so nothing is older than 9 months.
The spec's of StaBil, Lucas and others are up to 1 year. But that's probably under
ideal conditions. I'd go on the conservative side.

With running the trucks far less this year due to closures etc. I have been gradually
burning off my stores consuming in cars and the trucks. I've got less than 50 gallons
of reserves, but it's taken me 2 months to empty these Jerry's. I do need some
reserves on hand living in mud slide and earth quake territory.
Last edited by rmel on Fri Jun 19, 2020 12:38 pm, edited 1 time in total.
Puller: 71' 710K 2.7L EFI aka Mozo
Follower: Sankey MK 3, 3/4 Tonne
Rescue Pinz: 73' 712M

Driver: Ron // KO0Q

whitesik
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Location: Indiana, U.S.A.

Re: Gasoline stabilizer??

Post by whitesik » Fri Jun 19, 2020 12:36 pm

Thanks! I guess my main question was whether Stabil had any negative effect on these older engine components as ethanol reportedly does. If not, Stabil is going in.
75 Swiss 710K
Not so new owner but still a novice

pinzinator
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Joined: Thu Jul 29, 2004 3:12 pm
Location: Indio, California

Re: Gasoline stabilizer??

Post by pinzinator » Fri Jun 19, 2020 2:21 pm

I have used Stabil for years, including gas to the Pinzgauer. All I can say is that it really works, gas will stay good for a year or more as I have experienced. I use it for chain saws and generators with great results, too.

ChickenPinz
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Re: Gasoline stabilizer??

Post by ChickenPinz » Fri Jun 19, 2020 3:56 pm

FWIW, I've had zero issues with [top tier] gasoline stored in *sealed* jerry cans for 1-2 years. But they must be sealed. When I refill a jerry can I write on it with a Sharpie the date and type of fuel.

Like others, I advocate rotating your fuel stock. If you need extended storage, then run the carbs dry to avoid build-up of "varnish".

And the gasohol thing...I came from Iowa, a state where it was introduced pretty early, and frankly, I've not seen issues with any older engines. The only issue I have is that it's more sensitive to heat-related issues such that I see more engine flooding on my mid-80's vehicles after hot shutdown.
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rmel
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Re: Gasoline stabilizer??

Post by rmel » Fri Jun 19, 2020 7:03 pm

Jerry cans are among the best to store fuel -- good point. But the fuel will still
degrade. Phase separation can occur especially if the stored fuel is subjected
to elevated temperature. If you store in a cool place, filled to the max, you
are far better off. But after one year expect 91 Octane to drop to 87 on you
with some solids in there as a bonus.

The chart below shows a study done in S.Korea using a well sealed Steel container
as the baseline versus a number of plastic containers. They use the RON system in
SK so 93 Octane is equivalent to our 91. I have read articles where lower Octane
gas degrades faster e.g. regular, but I could not find any data to show how much faster.
fuel.png
fuel.png (85.38 KiB) Viewed 656 times
Puller: 71' 710K 2.7L EFI aka Mozo
Follower: Sankey MK 3, 3/4 Tonne
Rescue Pinz: 73' 712M

Driver: Ron // KO0Q

ChickenPinz
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Re: Gasoline stabilizer??

Post by ChickenPinz » Fri Jun 19, 2020 7:16 pm

...and that's why I always fill my jerry cans with premium (91) octane fuel.
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