Ottomatic: I was thinking of giving it a try. I talked to Sciulli: On our powerstroke board. He speaks really hi on the product... He started using a product called FT-10. which he states is as good or better then. We have a sponser on the site that sells the FT-10. Check it out.
I have run FT-10 in my Ranger. It is the only fuel additive that seemed to give a "boost" that I have tried. No mileage figures. It is expensive for what it is (check the MSDS) and has a chlorine EP add in it. But the stuff did seem to work.