Seafoam or Stabil in Shelby GT 350?

Bdubbs

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Hey guys,

We purchased our 350 this May. Winter storage isn't far away for us in Minnesotans. I'm wondering if I should store the car with a certain stabilizer? I generally prefer using Seafoam.

My cars are stored in a dry low humidity shop. I generally keep it at 63-65 degrees.

Thanks for the help!

IMG_20220730_072122601.jpg

 

CANTWN4LSN

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Nice stable and storage facility.
For four months of winter storage is a stabilizer really necessary for most of us? Have been doing without one for five years, just running through a tank or two of and then filling up with non-ethanol premium before hibernation and have noticed no problems. Wonder if there is any good science behind this or if it's just a theoretical consideration. Maybe if there are significant temperature fluctuation and ambient humidity variables, or if we are talking real long term storage such as a year or two, or you had an old fashioned carburetor it might make more of a difference. Not trying to put the gas stabilizer folks out of business, just wonder if there is any proof that it is real world consequential. Up to you in the end though.
 

Rick#7

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I put a can of seafoam in the tank when I do an oil change just as preventative maintenance, to help keep the fuel system free of any potential build up. It's great stuff, but I never considered it a stabilizer. I've used sta-bil in past when I had to leave my '73 parked for extended periods due to maintenance issues, and it worked well. That had an old carburetor also, which tends to be more sensitive to old gas gumming things up.
 

Postal Bob

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I use StaBil marine formula. My car is stored outside for 3-4 months, and I've hadn't had any problems when starting back up again.
 

Vertex

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If these are sitting in a garage that is heated and around the temps you stated I honestly would not bother putting either in them. I usually put stabilizer in my motorcycles and that's it cause they sit in a non insulated non heated garage.
 


Skye

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Man, your storage area rivals the inside of my house. LOL.

This will be the first car I'm going to park for some time (a few months for Winter). I plan on using Sta-bil with a tank of gas for a covered car inside an insulated, but unheated garage (gets as cold as mid-30s inside).

I might not need it as it will be four or five months. I see it as cheap insurance and peace of mind to prevent any possible gum build-up or absorption of moisture by the fuel.

I haven't used Seafoam before, but I'm sure it is just as capable.
 

Strokerswild

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Just make sure the car has non-oxygenated gas (no ethanol) in it, no worries.
 

EFI

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Man, you have a great collection for the location and not being able to use any of them for 4-5 months out of the year. That's a collection worthy of Southern Florida or California.

I agree with the others. For such a short storage in a climate controlled environment you probably don't need anything. It certainly won't hurt though if you choose to use either.
 

Mrhavasu

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I have had gas go bad in my bikes in 30 days. Stabil works and there are plenty of
tests and magazine reviews to prove it. Question is, do you really need it.
Here in CA we do. Stabil is cheap insurance, does not cost much and it works.
You maybe can find pure gas, but thats expensive. I also like the marine version
of stabil because it has oil in it. Ethanol is abrasive and this is supposed to help.
In all of my off road vehicles and sometimes the shelby,
I add Stabil and Mercury marine outboard ashless 2 stroke oil. When I pull apart
carbs doing this, they are spotless and in perfect shape years later.
 
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Bdubbs

Bdubbs

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Thanks for the help everyone! I actually run E85 in my 03 cobra. I've been storing it for years with 91 non oxygenated fuel. I tested some ethanol that was in a VP racing jug from last fall and it tested fine. I'm considering storing that with E85 and I use Lucas ethanol treatment in that car. I have E85 sit for months in the summer, and then still use it without any problems.

All my other cars I use 91 non oxygenated fuel. I can see the 67 fastback being a pain without using a stabilizer. Seafoam claims it keeps fuel stabilized for 6+ months I believe.

I appreciate all the help!

Here's a couple more pictures. Our 90 7 up edition vert is currently at the house for the summer.

IMG_20220825_053606577.jpg


IMG_20220824_194551438_HDR.jpg
 

Specracer

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I use Startron in out boat, but all the cars, I dont bother. 6 months has not been long enough to have any issues (20+ years experience, and the sample size is currently around 25 cars). Works for me, and so far the cars as well. I think the biggest thing is to drive them (as you do)....
 

Gray Area GT350

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I have had very good results with 102 octane race gas from a local station. The Minnesota storage season is easily 5-6 months (Nov-Apr) and both my Mustangs have not had any issues.
 

 
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