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Old 10-20-2017, 08:41 PM   #1
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Seafoam or Sta-bil

What is everyone using as a fuel stabilizer?
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Old 10-20-2017, 09:01 PM   #2
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SeaFoam is an engine fuel system cleaner. It dissolves deposits and cleans injectors or carburetor jets and passages. STA-BIL is an additive to fuel that keeps it fresh and usable for up to 24 months and prevents gum and varnish build up in the fuel system.

Periodically add SeaFoam to clean the system, but for storage over a period of time, add STA-BIL and run the engine long enough to get it throughout the system.
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Old 10-20-2017, 09:11 PM   #3
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What BFliin said.
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Old 10-20-2017, 09:22 PM   #4
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Quote:
Originally Posted by BFlinn181 View Post
, but for storage over a period of time, add STA-BIL and run the engine long enough to get it throughout the system.
And Generator (under load)
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Old 10-21-2017, 02:48 PM   #5
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I use Star Tron for my boat and motorhome.
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Old 10-21-2017, 04:43 PM   #6
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May be overkill but I use proper dose of Stabil and 1 can of SeaFoam for 75 gallons over winter. Has worked well over several class A's.
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Old 10-21-2017, 05:42 PM   #7
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If storing a diesel, you need a biocide, here's what I use:

https://www.westmarine.com/buy/biobo...96?recordNum=2
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Old 10-21-2017, 06:10 PM   #8
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This summer was our first year storing a boat in Lake havasu City. All last winter I ran stabil in the fuel and tried to run the tanks down by the time we left, but one tank still had 14 gallons and the other was on empty but still had some gas in the tank. From mid April to early Oct, all of the gas went stale. When the carb was disassembled, it was coated with a green varnish. I did everything that a local marine shop said to do and still ended up with a carb rebuild and the expense of pumping and disposing of the bad gas. In WI, I do the same thing and have not had any issues with a 97 carburetor Honda which I pull the line off and run the carbs dry. The summer heat here really kills the stored gas. I'm not sure what would work.
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Old 10-21-2017, 06:11 PM   #9
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Quote:
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If storing a diesel, you need a biocide, here's what I use:

https://www.westmarine.com/buy/biobo...96?recordNum=2
Diesel fuel doesn't really need a stabilizer, diesel doesn't turn to varnish or gum up things like gasoline does. STA-BIL does make a diesel fuel stabilizer, but I've started diesel heavy equipment that has been left in a field for over 3 years and started with little effort. STA-BIL Diesel Stabilizer.

STA-BIL also makes a Diesel Biocide.

Sea Foam also makes products for diesel engines.
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Old 10-22-2017, 04:59 AM   #10
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Diesel fuel will turn into jelly if it gets too cold and that will be a problem. Would add some kind of diesel fuel stabilizer and run the fuel level down.
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Old 10-22-2017, 07:01 AM   #11
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Quote:
Originally Posted by BFlinn181 View Post
SeaFoam is an engine fuel system cleaner. It dissolves deposits and cleans injectors or carburetor jets and passages. STA-BIL is an additive to fuel that keeps it fresh and usable for up to 24 months and prevents gum and varnish build up in the fuel system.

Periodically add SeaFoam to clean the system, but for storage over a period of time, add STA-BIL and run the engine long enough to get it throughout the system.
SeaFoam does both. Read the can.
On the back label it says:
• Controls Moisture in fuel tanks & lines
• Helps Stabilizes and condition fuels for engine storage
NOTE: 5 - 16oz. cans to 80 gal. of gas (or 1oz./gal), run engine & generator to circulate through both. $6.97/can @ Walmart, but sometimes you can find cheaper on sale at other car part stores.
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Old 10-22-2017, 07:15 AM   #12
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Quote:
Diesel fuel doesn't really need a stabilizer
The truth is that all fuels will degrade over time. In fact, the EPA reports that ULSD diesel has a shelf life of between 3-6 months. Biodiesel, too, has a shelf life that can vary significantly, but with the proper fuel management, biodiesel's shelf life can be extended dramatically.

The key is keeping the fuel cool and keeping the fuel dry. Under ideal conditions, diesel fuel can be stored between six and twelve months. To extend the life past twelve months, even under the best conditions, it needs to be treated with fuel stabilizers and biocides.
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Old 10-22-2017, 07:33 AM   #13
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I fill my RV with non-ethanol premium gas and add three cans of SeaFoam. I run the gen for a while until up to op temp and then shut everything down. 8 motorhomes over 30 years and no fuel problems.
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Old 10-22-2017, 08:31 AM   #14
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I have not been able to find any fuel additive that addresses the problem of phase separation. Stabil usually can be relied upon to prevent "spoilage" during storage. The OP results are sort of discouraging though.
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