I tried this for myself too. I got ahold of some labratory grade Acetone by Fisher.
I used it in two vehicles that I've owned for years. I track my milage per tank at every fill up. My mpt is very consistant. After using about 3oz. per gallon in both vehicles. MPT did not change at all. So IMO, this is a myth, and it's busted.
I've only done it for a few tank fulls now, so I'll keep doing it untill I'm out of this batch of Acetone. If something changes, I'll post
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