Can you make napalm out of gasoline and orange juice concentrate? According to the novel Fight Club by Chuck Palahniuk:


  The three ways to make napalm: One, you can mix equal parts of
  gasoline and frozen orange juice concentrate. Two, you can mix equal
  parts of gasoline and diet cola. Three, you can dissolve crumbled cat
  litter in gasoline until the mixture is thick.


The napalm is originally called napalm because is mixture of naphthenic acid  and palmitic acid. This makes me very skeptic about it being created by gasoline and juice. Also I see no reason for it to be frozen.

The only thing that sounds realistic to achieve the sticky effect is the use of cat litter - but you could as well just use dry dirt, couldn't you? And dirt doesn't really burn so you're weakening the burning effect.
Here's an excerpt from an interview with the author of Fight Club, Chuck Palhniuk.


  How to make Napalm with Frozen Orange Juice and Gasoline?
  
  Well, Ed Norton changed one ingredient in every one to make them useless. So, that really pissed me off because I really research those really well. Actually its styrofoam and gasoline - it make the most incredible explosive.


http://www.dvdtalk.com/interviews/chuck_palahniuk.html

So no, Fight Club does not accurately convey any of the recipes. All were clearly modified. And most likely for safety reasons - i.e. you wouldn't want someone to walk out the theatre with a "bright" idea. On the other hand I would still expect a mixture of gasoline and orange juice concentrate to be rather flammable ...