“Burnt acetone in the exhaust fools the oxygen sensor into thinking the motor is running too rich so the PCM leans the intake mixture.”
It was apparently unable to do so on Mythbusters.
Aside from any experiments on Mythbusters, unless you're trying to hot-rod your car why would you want to trick the complicated engine management system that's already trying to give you the best mileage it can?
I'm not a mechanic, so I have a question for you all: What's the result of running your engine too lean for an extended period? I don't think the answer will be very positive.