For the past few months I've employed a one ounce dose (per tank) of Acetone to the tank of my GF's 97 Escort. B4 this I had never used anyhting in the tank as I was doing extended oil change intervals on Mobil1 (20,000km changes) and I didn't want to dilute the oil considering it's thinningstate at those high mileages.

As a result, I had taken the advice from a fellow BMW enthusiast (who also drives old 5 series BMW's) to use this dose of Acetone in every tank as it will not only safely remove the carbon and varnish from the valves and pistons, but it would also not have leave any diluting bi-products in the oil.

After about 20-30 tanks on 1 container (I still have over 1/4 left) of Acetone, I've also noticed that the car idles smoother, and has more power. The effects are very similar to using a higher octane gas...the only difference b/t this stuff and using other octane additives as well as filling up on higher octane fuels, is that per tank, the aditional cost is a mere 5-7 cents extra PER TANK over the additional 3-4 dollars one would spend on the aforementioned methods of conditioning the fuel. Not to ention that the $6-7 can of Acetone will easily last about 30 tankfulls.

To administer the appropriate doseage, I have been using a syringe that I had measured out the exact amount equal to 1 oz (2 fills). I would nto recommend too much Acetone as it may accelerate the breakdown of the rubber hoses and seals in the fuel system.

Fi anyone has any q's about this procedure, please feel free to email me at bmwguy2_2_@roadfly.org (no spaces)