>Gasoline now contains Benzene additives
Gas is really a soup of different random carbon molecules formed by breaking apart longer more complex molecules, it contains all kinds of weird things...
I poorly worded it, Rusty. I should have said that I now understand it contains it.
Yes, benzene, toluene, xylene..........depending on the refining process. The recipe I know very well is - 87 Octane gasoline would be a blend of Isomate, Platformate, Crack Gas, Alkylate, and depending on the season and vapor pressure levels of those ingredients....Butane would be added as appropriate to achieve a target vapor pressure for the season. 93 Octane gasoline would not have Crack Gas present (b/c it reverts to waxy oils fairly quickly) and would have higher concentrations of Platformate (which has the highest octane of the ingredients noted above). As you note there are all sorts of various levels of other hydrocarbons present (and not JUST hydrocarbons) because of the expense to achieve refinement to purity. On the other end, you'll find Isomate, as an example, in asphalts.
87 Octane having crack gas present is the very reason I only put 93 Octane in my small engines. The current DOT requirements only call for additives to stabilize the crack gas for 6 months, I believe - no requirement for longer.
Uh..I hate to tell you this, but, gasoline components are refined by several processes - it's not as simple as separating/breaking hydrocarbon molecules anymore :)