May I respectfully suggest that you look at butyl cellosolve.
I was looking at the ingrediants of Berryman's B-12 Fuel Additive:
2- Butoxethanol (111-76-2)
Mixed Xylenes (1330-20-7)
Methyl Ethyl Ketone (78-93-3)
Curious as to what all that stuff is and what it does?