Improve mileage 2-3 MPG, both diesel and gas, smoother running and quicker accelleration. This was not my idea, however I felt this was the forum to share it with.
Purchase 100% pure Acetone and add to full tank of gas or diesel at the ratio of 2oz. per 10gal. of fuel. Do not use cheap plastic container as a refill container as it will melt. I bought a Cutex nail polish remover bottle (4oz), ran the contents through and reused the container.