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I shoot for about 2 oz per 10 gallons (2 shots from a shot glass per tank). I use the Home Depot Grade (~95% pure?) I ran it every tank but ran out and have not gotten more. I do it on long trips where I use more than a tank. I only use my 4rnr occassionally and the acetone seems to "spoil" the gas after 2-3 weeks. It results it 13-15 mpg for the remainder of the tank, so I don't use acetone when I'm not driving it much. That part I haven't proven. The 20% increase in mileage I have proven over and over and over.



That's very interesting. I've read that the diluted acetone can be less effective because the "other" stuff that's added to it actually counteracts the gains that the acetone can produce. But, having said that, I've been reading reports from all over of people that are getting good gains on the regular cheap stuff. I've got some laying around the house. I'll try it before too long.