I bought 2 more 16oz boxes of the Gulf Wax - just returned them back to walmart.
Got the PowerService Gray (does 100gal) for about the same price as the 2 boxes of wax.
There are Chunks of wax still sitting at the bottom of my 2 gallon jug of diesel. Gives me the creeps thinking about how my aftermarket fuel tank has no screen going into the fuel line. I may add a little bit of wax during the summer, because I still have some, but I don't think I'm gonna start adding it on every fill up to try to improve performance. That wax, when solid, sinks in diesel fuel and it might build up in the bottom of the tank.