I can actually get the Lubro Diesel Purge at my local NAPA for a fraction of the cost of online!
I have run one can through when the fuel was low, but I haven't run it directly yet, though it suggests it on the can as well.
I ran two cans through my Isuzu 4BD1T that was having injection issues (think the rack was sticking) With in 30sec of running the engine on the straight purge it was like new. Was amazing and I got it on film too.
I was extremely impressed.
Sounds like you are rolling right along.