Puddin' Man wrote:

I got this container of STA-BIL, maybe 6 years old, in a 4 oz can like the
old lighter fluid cans (with a squirt spout). Sez 4 oz treats 5 gal's of
gas. Maybe 3 oz left. Can looks fine, no rust or anything.

I squirted a bit into a glass container. Yellow in color, no evident
contamination.

The instructions say to discard after a bit. Most of the instructions
on most of the stuff in this world are subject to the "Squirrelly BS"
consideration. :-)

I don't necessarily trust this stuff, but ...

Would you use it for small 4-stroke motors, 3-4 mos. winter storage?

I wouldn't use it.

http://www.goldeagle.com/sta-bil/faq...t=sta-bil&ID=9

"What is the shelf life of STA-BIL Fuel Stabilizer?

"2 years after the bottle has been opened, provided it has been tightly
capped and stored in a cool, dry place."