Here in Missouri, the outside temperature has hit 100 degrees many times this summer. I have carried my acetone in a quart steel can in my Explorer .... but this is a very stupid thing for me to do --- but, alas, my life is filled with stupid things that I have done. Luckily, there has been no consiquences to this bout of stupidity.
I imagine that on those 100+ degree days, the inside of the Explorer get way high....and the boiling point of acetone is 133 degrees. I wondered why my acetone can was empty one day!
Be aware of this point and don't carry your acetone in your super hot car.......
I just started adding 3 oz acetone / 10 gal. gasoline to a little KIA. It normally gets 32-33 mpg or so. The car has about 55K miles on it, and has a standard trans. I'll report results when I get them.....