[The Cajun]

I truly believe in Stabil, good for a year.
Look on Camper sites and those folks swear by it.
According to the product, you can increase the storage time to two years if you double the amount you put in per gallon.
I personally have never tried the two year thing, think 1 year of storage is enough.

[steve86]

I been known to go 2.5 times regular dose for 2.5 years. I wouldn’t push it much past that although the fuel still looks pretty good although somewhat amber. No black deposits, though, like you’d get without stabilizer.