The Napa auto parts store in town has the same stuff on an end caseIMHO the hard to find Lurbra Molly Diesel purge is the best.
http://www.amazon.com/Liqui-Moly-2005-Diesel-Purge/dp/B00CPL8OVE
Run it straight out of the can into the fuel filter. Clamp the can in there somewhere and tap off the return line to the can as well if it goes to the tank normally. When can gets near empty fill it with one more can. When it gets near empty hook your tank back up. Replace the filters. Pour remaining into the tank.
Does that mean all of us are salesmen?micomike, yes you are a salesman. Maybe you just don't paid for it!