SAFECASTLE PRI-D Fuel Diesel Treatment for Lubricity & Stability Improved Performance, Maintenance, and Emissions Reductions, Maximum Lubricity Protection, Super Concentrated & Safe (16 Oz (2 Pack))

This is a real fuel additive that isn't snake-oil medicine. It is used by the petroleum industry in their own storage systems. I use this to stabilize fuel in a generator. Every 14-months on the day, we fire it up to check the functionality - and every time it starts up and runs at full power without any issues. After the 1 hour runtime test, we drain and discard the old fuel for new...so I can't comment on how long this fuel additive will work beyond 14 months. Note - we do not use fuel with Alcohol mixed in. Before using this product, we constantly ran into fuel degradation problems. Generator is in an unregulated storage shed, so it gets hot/cold. No other fuel additive seemed to work.

Haven’t used it yet but all my research it’s the best you can buy

It’s exactly what husband wanted

We store a lot of gasoline being out in the country with lots of lawn cutting, weed whacking ,tree cutting and splitting, etc. We have gone longer then a year and never noticed a significant loss of power in any of our equipment. Two cycle engines are susceptible to bad gas and we have used old gas in all of our two cycle equipment with out any glitches. I have tried other treatments and this stuff REALLY works. Dilute as instructed. Don't over dilute or you are throwing your money away. If you want a long term gasoline storage solution, this is it!