Well, if you know how to handle toxic chemicals...

It's really the Dioxane that is the BAD one... the Xylene and Toluene are basically paint solvents... You can't buy Dioxane unless you have a special permit or can prove a legitimate use... The other stuff is available at your local hardware store.

Bortz makes the 100% Toluene and Xylene... These are only used as octane boosters... Toluene has an octane level of 122 +/- and Xylene is somewhere around 115 octane... So, mixed with regular pump gas of 91 octane, it increases the octane level on a mathematical basis...

The Dioxane is an oxygenater. It literally adds 02 into the fuel mixture and makes the fuel go POOF much better... But, it's a carcinogen and is absorbed through the skin if it's spilled on you... I always wear a mask & gloves when concocting the mixture...

The Marvel Mystery Oil is used as a lubricating / cleaning agent for the cylinders, heads, carbon deposits etc... It's been used for years mixed with aviation fuel to keep the cylinder heads clean...