Here is a post from Bobistheoilguy. Don't know how accurate but figure he knows more than me:
http://theoildrop.server101.com/cgi/ultimatebb.cgi?ubb=get_topic;f=5;t=003059
Acetone is made as a byproduct of the manufacture of phenol. That's why it's so cheap (relative to other solvents). Petrochemical companies would love to get rid of it by putting it into the gasoline pool.
With the bans on MTBE, it would make a great oxygenate to replace MTBE, to meet the clean air act ammendment's rule of 2% oxygen for RFG. Acetone has a higher oxygen content than MTBE or TAME.
There are lots of reasons why refiners would love to blend it in. They still don't. Why...becuase it can kill fuel system parts. It's not a conspiracy...it would already be there if not for the serious technical problems.
I think one of the reasons that acetone is NOT added to the "gasoline pool" is that the acetone evaporates out of the gasoline too fast....especially in a fuel tank/system that is not air-tight. I run through gasoline pretty quickly in the Explorer.
I would like to see the change in the concentration of acetone in a tank full of gasoline over time.
I posted that in the original thread, it probably wreaks havoc on the rubber and plastic pipes and seals. The concentrations are pretty low in this application, which is probably why the cars that have tried it have not yet fallen apart, but who knows about longer term usage. Also, I wonder if the corrosion problems could be worked out. I was also concerned about the possible "wash down" of the cylinder walls, of the oil layer that protects them, just a few caveats.. I might try this on an older cheapo car, but not on my new Odyssey...
so swap out to braided steel/ stainless steel lines.