I ordered this and will install it Thursday. Everything I've reviewed looks like it will help with soot in our EGR systems, and maybe a little better MPGs. The EPA has registered the product and it has been tested by many agencies. What the heck, it can't be any different than treating the exhaust with a catalyst. BTW, 8 lug had a very positive write-up on this.

Fitch Fuel Catalyst: Automotive - Main Page