Who knows anything about oil?
How many different flavors are produced and what does it go for?
Example: p-xylene - PET plastic
o-xylene - phthalates plasticizers
M-xylene-xx, that's how they sell.
toluene - bulging, solvents, glues, gasoline
benzene - seems to be allowed on cyclohexane, cyclohexanone and nylon, styrene and ethylbenzene