Shelf life of gas additive ?

[ChiTDI]

Went to my stash of a couple bottles and realized these may be dated and not beneficial.
What is the customary shelf life of Regane, Gumout, Berryman, Schaeffers 131, etc. ?

 

[Greasymechtech]

Contact the manufacturer. But, they'd also want to sell you more.
Most likely depends on local storage conditions

I don't worry about chem. I just use them as I go. I'd be a liar if I said that some of my fluids weren't in the shed/garage for a couple years. The only one that I recycle regularly is brake fluid. Dumped 3 year old stabilized gas in the car a few weeks ago and the car didn't notice.

 

[Lubener]

In my opinion, indefinate. I have used fuel addive being 15-20 years old without any issues.

 

[JohnnyG]

Think of it this way, the best way to dispose of old products like that is to use them for their intended purpose.
I'd venture to ay they will be just as effective as the day they were made.

 

[RaRa]

They potency will less but can be used until bottle leak or open .