There are no trade secret ingredients on MARVEL and the MSDS listing comes up to 100 %
From the MSDS
o-Dichlorobenzene 0 - 5%
Fine White Mineral Oil 70 - 100%
Mineral Spirits 20 - 30%
No, that does not equal 100% and is a typical example of MSDS obfuscation. Does the product have other ingredients? Beats me, they're not telling.
Dichlorobenzene is quite nasty stuff and will dissolve varnish... and possibly gaskets and hoses. The rest will accomplish little, certainly nothing adding 2-stroke oil wouldn't do.
But damn, they've got cool marketing.