Best Fuel Stabilizer?

With all the talk about ethanol fuel and bad gas, which fuel stabilizer is the best to use? They all seem to claim to reduce the effects of ethanol and prolong fuel life... but is there a clear winner in the bunch?  I've seen StaBil, Star Tron, Sea Foam, STP, Briggs & Stratton Fresh Start.

Sta-bil has one now for marine use that counteracts the ethanol fuel.
 
I've used regular Sta-bil for 8 years with no carb related issues on all my equipment. Have not tried other brands.

I use seafoam, and sta bil blue (marine?) In every fill up/can. The newer fule not only is prone to phase sep but the shelf life is extreemly short. If you are unlucky enough to be stuck with ethanol like me in New England do yourself a favor and start using a higher octane fuel. Leave the low grade 87 at the pump. Use high grade or mid grade at least. This way if you do get a little water in the fuel tou will still have useable gas once you strip the water out.

I can be more technical if anyone wants but this is a simple example.

Gas with ethanol suspends the water rather than letting it fall to the bottom like conventional fuel. Reformulated gas holds the water like a rain cloud, once the gas cant support the weight of the water it falls out stripping the ethanol from the gas. No ethanol means no octane and low octane translates to no burn.

So by using a higher octaine fuel you have a better chance of salvaging your gas should you get phase separation.

There is more science to it like temperature, % of ethanol etc. But...

Jesse

I've had really good luck with the Briggs stabilizer. Part #100118 for the 8 oz size. I use this in all my personal equipment and I sell a lot of it in my small engine shop. Every can of fuel I get for the shop or myself I add the Briggs stabilizer, both 2 and 4 stroke.

Briggs no longer supplies Fresh Start, it was not compatible with E15 fuel. They now have Advanced Formula which seems to work very well. We did get complaints of a gray residue left in the fuel system, it is actually a corrosion inhibitor.

You are right on Mike. It seems the Stihl two stroke oil has a great stablelizer in it. I have no carb troubles the following season leaving the mixed high octane gas with no ethanol in it. Great product! Bluedenim

My Dad got me on Seafoam about 45 yrs ago.   Once you open the can, use some & recap it. It will stay good on the shelf forever.  It does not go bad.  & can stabilize gas for 2 years (I have tested that).  I have even put some in an air gun that was gonna need taken apart to clean, but the Seafoam took care of it. 
 
Not bashing Sta-Bil, but once you open it, best to write the date on the bottle, cause it will go bad by 2 yrs & can only stabilize for 1 year. 
 
I only use 100% gas,  & I get my Seafoam from Wally world for like $6. for 16 oz bottle.
 
 

Finding non ethanol in some areas is difficult to do, though. My nearest non ethanol station is 30 miles away.

Good for part suppliers like Jack's and OPE repair shops as well. Not to mention those subsidized from the govt.
Personally I use ethanol gas and have few problems with it. Mainly the "cube" carbs is it a problem for me. Which is the reason I use Motomix in my stihl. I leave the ethanol in my fuel tank every year in my mower from November till March and have only once cleaned a carb, and I live in humid Georgia. Might be 40 today and 80 tmw, lol.

I use seafoam and have never had issues but never tried other brands being satisficed.