Asking about fuel stabilizers is like asking about motor oil or religion. You are going to get a wide variety of answers with varying opinions running the gamut from "fuel additives are a scam" to "I've been using this product every fill up since 1950 and my engines always run great".....
That being said, I have had bad experiences with red Stabil and Star-tron enzyme fuel treatment so I no longer use them. I use K100MG or Biobor EB. K100MG goes in all the equipment with a smaller gas tank like; lawn equipment, motorcycles, etc. For cars, trucks or anything larger than about a 10 gallon gas tank, I use Biobor EB.