I run the Hot Shots Secret EDT every tank on my 18.

I did get almost 1 mpg better using, but what really sold it was how the fuel filters look when changing.

They used to come out dark black, but they come out a light grey when using EDT.

I also notice that the smoke isn't as noticeable on the higher hp tunes, not like there is much more than a puff when I first get on it anyway.

I work in the fuel industry, and I would recommend adding lubricity of some type. What they add at the loading racks isn't all that great, and it's injected as it's being loaded.

Who knows what is in that from state to state.