Ok, so I'm usually very skeptical about additives in gasoline, anti-everything, etc. I used my ZJ today as a ginnea pig for this. Most sites I read said to use no more than 3oz per 10 gal of gas. My ZJ holds 23 gallons, so after filling completely, I added 7oz of Acetone I got for $3.99/qt. It has a real-time mpg display, and although it's probably not something which would hold much scientific worthiness, I was in complete awe when I took it for a test drive. I have the 5.2 in there, with 172,500 miles on the clock. I average around 14mpg per tank which is almost always city driving. I added this stuff, shook the Jeep around to try to mix it up a bit, and took it for a drive. At first, I didn't see much of a change, if any. Suddenly, and I assume due to the non-mixed gas being purged from the lines, my MPG display jumped, from 19mpg at 30mph directly to an unbelievable 27mpg. It then continued to climb, and stopped at 34mpg. I cruised along for nearly 2 straight miles seeing no less than 30mpg at 30mph. I continued to drive the same roads, and compared my real-time readings to notes I'd taken with the last tank: Using cruise control on the same road, where I got 21mpg cruising at 30mph, I was now seeing over 30. At 40mph, same road, I was seeing 29mpg, before Acetone, it was 22. At 50mph I was seeing 27-29mpg, before I was seeing 22-23. This seems incredbile, and somewhat unbelievable. If this is indeed even close to accurate, I believe the stang and my van will be next to receive the Acetone. Anyone else tried this stuff???