I'm trying Valvtect in my boat. I'm too cheap to go buy Valvtect gas for my, so I'm using their additive. Treats 4 times as much per ounce than Stabil and is supposed to be good stuff...
http://www.valvtect.com/pdf/ValvTect_XP_Gasoline_Handout_Proof.pdf
https://www.amazon.com/Valvtect-Eth...&qid=1478266086&sr=8-1-spell&keywords=valvtec
Crazy talkI usually just throw expired stuff away.
I used stabil for years, BUT probably 10 years ago switched to Start-tron. IMO much better. Stabil is only good for one season, star tron is good for a solid 24 months.
https://www.watcon.com/shop-supplies/fuel-treatment
Crazy talk