Jeffory:

Yes, check the archives as Guillermo-de-San-Diego suggests.

In particular, find the reports from about 3 years ago by
Mark Drillock on the efficiency of the friges and the best
fan replacement.  He did a lot of testing on various
friges.  One thing he found is that the correct propane
pressure is an important part of how well the frig works.
There are a bunch of posts on that topic, too.

For starters, see his post of 27 April 1999.

                           Richard A. Jones
                           Boulder, Colorado
                           '81 Vanagon   Mr Bus
                           '87 Syncro Westy   El Jefe