Fuel conditioner
Race Director
Joined: Apr 2017
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From: Virginia
No, I've stored many cars over the years, 6-8 months and never used fuel stabilizer and never had an issue. 4 months is just extended parking, nothing needed except a battery tender.
Burning Brakes
Joined: Oct 2004
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From: Bowmanville, Ontario, Canada
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Joined: Jul 2004
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From: Hartford WI
I'm not what difference the higher temperature makes...but when I store mine for 4 months or so over the winter (partly above, partly below freezing) I've been advised to fill up the tank and put a bottle of fuel stabilizer in there. My understanding is that gas will get stale over time...again, not sure if this is temperature related. For the modest cost of the stabilizer, I'm happy to do it.
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Power Service is the manufacturer of diesel fuel additives I've used in my diesel cars and HD diesel trucks for over 40 years. Great products!
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From: Bonneville Salt Flats
It cannot hurt. I've used Sta-bil for years in nearly a dozen vehicles and assorted motorized equipment not driven/used regularly without issue. It's not unusual for manufacturers of gas-powered equipment to recommend it. Use it or not, all the best in any event. 
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From: Pittsburgh
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I personally would recommend using Stabil, it's not expensive & would give me peace of mind
Team Owner
Joined: Jul 2004
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From: Hartford WI
It can't hurt. Stabil is used annually in all my lawn care fuel tanks. It works as prescribed. I use Techron in Stingray, and it has made a noticeable difference in it's 360° performance as well.
Power Service is the manufacturer of diesel fuel additives I've used in my diesel cars and HD diesel trucks for over 40 years. Great products!
Power Service is the manufacturer of diesel fuel additives I've used in my diesel cars and HD diesel trucks for over 40 years. Great products!
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I put Sta-BIL in my gas tank when I store the car over the winter. Cheap insurance that the fuel remains fresh.
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From: Jacksonville Florida BWO Dayton, Cincinnati, Bloomsbury NJ, Cincinnati
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I'm spoiled. I've never stored a car over the winter nor at any time. I drove them daily in the winter in Ohio and down here in Florida. So ya'll are on your own for a stabil discussion.
To the folks who are storees, sorry about that!
Elmer
To the folks who are storees, sorry about that!
Elmer
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From: Hartford WI
Just took mine out of storage for 4 months putting in only E10 fuel before . Never had any issues doing so either. Didn't run any sort of data scanning but the SOTP dyno didn't feel the difference. So there we are.
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From: Virginia
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Joined: Jul 2004
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From: Hartford WI
I'm sure the parts stores will disagree with you on this principle. What is the best probability depends on what the current promotion is.