I've been meaning to ask you guys what you think about Sta-Bil's 360 Protection. It's Ethanol treatment as well as stabilizer.
New York elephant repellant is the term that comes to mind
The story is the same as fuel breakdown it is dependent on so many different climatic conditions it is impossible to make a blanket appraisal.
They are needed for some thing like 5% of the country.
At best they will do no harm if used in the concentrations prescribed on the cans other than lighten your wallet .
Scam is not quite the right word because in the 5 % of places they are needed they work quite well
Over marketed on par with WD 40 in order to convince the 95 % who don't need it to believe that they do thus sell a lot more product would be more like it .
As for the you tube video, regardless of the fact I agree with his conclusions, it is not proof of anything other than the fact he has little understanding of fuel physics & chemistry
I will use a for instance here.
Customer who hangs his line trimmers on hooks on the side of a steel yard shed , next to them is the two walk behinds and in the middle is the ride on .
It is a std 8' x 10' garden shed on concrete tiles ( to avoid planning laws ) .
The ride on & one of the walk behinds that is nearer the door never have any problems
The walk behind in the corner & the stuff hanging on the wall all suffer from fuel going off chronically
So he is now using Stabil for the walk behinds & tipping the trimmers out & running them dry
So the difference between needing Stabil & not needing it can be as little as a couple of feet away from a wall in an 8 x 10 shed .
I did try to fit taps to the walk behinds but the mowers are too compact & thus cumbersome to use the taps