Yeah I'll be looking into the evergreen stuff too strokin6L, especially because of the price difference, but also because it appears it may actually be a better product. I need to try some for myself though.
FWIW, I am running Rev-X right now, and it does wonders. I would ALWAYS run 2 bottles. It's an oil additive, so once the oil is drained, it's gone, so I don't see how 1 bottle will ever produce the results of 2 bottles. This last batch I did, I put one bottle in, drove it for a few days, then added the second. I could tell a difference.