If I were to use an additive on a regular basis, it would be Marvel Mystery Oil. Yep that's right, I said it. It's one of the oldest chemicals that was originally created by the Marvel Carburetor Company back in the day. And I do mean back in the day! I have been using it for decades. I use it in virtually every gas operated engine I have. In my opinion, it is one of the best carbon dissolvers and top cylinder lubricants I have ever used. Used regularly it will keep your valves, injectors and pistons clean. Recommendation is 4 ounces per 10 gallons of gas. I don't recommend it for water dissipation. However, if some of you are old enough, you will remember a product called Siloo for Gas Tanks. It was sold in a tall orange can.
Big H
What's in the Mystery oil? From their MSDS:
70% Light Aromatic Oil (Pale Oil)
- It is a Naphthenic Oil, so while it oxidizes faster than a Paraffinic oil, it does clean and dissolve sludge and carbon well and cleans up after itself from any oxidation. serves as base oil as well. [Naphthenic oils have more solvency and are more polar (they are attracted to metal more), but oxidize faster.
29% Mineral Spirits
- Cleans Varnish very well. General cleaner. Also acts as an antioxidant.
38 parts per million (ppm) Boron
- antiwear/extreme pressure agent, friction reducer, antioxidant
900 ppm Tricresyl phosphate, an antiwear and extreme pressure additive in lubricants
- antiwear/extreme pressure agent
1/2% 1, 2 ortho-Dichlorobenzene
- extreme pressure agent as it interacts with Iron to form an Iron chloride barrier under any ZDDP or other AW additives. Also very good cleaner/solvent, and friction reducer
1/4% 1, 4 para-Dichlorobenzene
- extreme pressure agent as it interacts with Iron to form an Iron chloride barrier under any ZDDP or other AW additives. Also very good cleaner/solvent, and friction reducer
Oil of wintergreen - for the scent
- Not just for the cent, is also a cleaner. may aid lubricity.
Red Dye - for the color
- well this one just colors the stuff