Stabil or Seafoam for long term gas can storage?

A search for stabil resulted in 42 posts; some of which are responses to this post.
The Goldeagle website states a `2 year life from the time the can is opened. Old sta-bil is OK to use but may not be as effective.'
For our snow blower we use the gas/oil mixture from Ace. Since we typically go thru a few cans in a season storage does not seem to be a problem.
Our lawn mower is electric.