Covering the first of 10 or so chemicals that I have found useful over the years as a farmer and mechanic. Marvel Mystery Oil has been around for almost 100 years now, and for good reason. It actually works! This is no cure for a blown engine or serious case of neglect, but as a regular part of routine maintenance, it can make difference!
![](https://s2.save4k.ru/pic/d99OWt1ECpE/maxresdefault.jpg)