"Sulfur (4-8%) dissolved in rapeseed oil at 120-180 C gives a flexible, gummy polymer."
Apparently, S adds across the >C=C< bonds to give a cross-linked polymeric material called fractis. So it is not just dissolution, but rather achieving solubility by a chemical reaction. If you are looking to use argan oil, note that it contains about 37% linoleic acid, which has >C=C< so will probably give the gummy polymer.
Try with olive oil first (inexpensive) before using argan oil.
[Rapeseed oil = canola oil]
PS Please let us know how it goes.