Used it for years now, on anything on the ranch that runs on gasoline and I would NOT be without it.
I mean: Chain saws, weed whackers, pressure washers, lawn mowers, lawn tractors, grain auger motors, family cars & farm trucks. That's not a complete list, but I'll tell you WHY I use it. When I was younger, I remember starting "seasonal" equipment, and pulling, pushing, cranking, yanking and lots of frustration. But once I started using Stabil, plain and simple...those problems went away and I sure didn't miss the frustration at all!
Besides, the peace of mind is worth the....what? maybe $30-$50 a year I'd spend for enough Stabil for all all these gizmos? Most of the above had relatively small fuel tanks, so I didn't need a lot. The vehicles always got a double dose at the end of their season's work, and I always figured it made a difference in starting 'em up for the next session.
Now that we're retired, the car sits for six months a year and it definitely gets a dose, as does our Honda EU3000, and I still use it in all the small engine gizmos.
Would I quit using it? NO WAY!! Peace of mind and lack of frustration is well worth the small amount I spend on it.
Just remember, opinions are like ashcans, everyone's got one, this'n is mine!