I've heard it's best to run this stuff directly through your engine rather than pour it into the tank. Apparently you should pour it into a glass jar and run the engine (10 mins or so) until you almost run out (DON'T suck air into the engine!). I haven't done mine yet but this is the procedure I will follow..
The best diagram of this is in any of Impco's catalogs. Look up Diesel Purge in their catalog and they have a diagram and instructions on how to do this.
Neal Bhatt - email@example.com
'83 300SD 190k