gkamer
Sadly passed away, December '23.
I believe I first heard about it in my teens, over 60 years ago. Always thought of it as another one of those "snake oil" cures for every engine ill imaginable! But, maybe it's good stuff. I've never used it. I just looked at their website. Next year will be their 100th anniversary, so if nothing else you have to give them credit for business longevity!
Yup, they've been around since 1923 so they must be doing something right.
