Mark,
Over the years the two subjects that have probably cereated the most discussion on this site is the Wallas Stove and whether a C-Dory should have one main engine or two engines. If you were to perform a comprehensive search on this site about either of the subjects you would find many threads and a multitude of comments about the two. Many of the comments would be repetitive. From reading the comments on the threads over the years, I would say that folks have had varying degrees of success and failures with their Wallas stove and it doesn't seem to matter what choice of fuel they use. I do know that some folks have been chastised (I hope that is a correct depiction of the comment made once) by Scan Marine for not using diesel.
Personally, I got started using Kleen Heat and have used nothing else and had no problems (knock on wood). That is not to say that I won't have problems in the future. (Most likely, I will now since I've said all of this).
The things that I do believe has contributed to my success with the Wallas is that prior to starting it up, I turn the temperature control up to the maximum setting, I lift the lid so the fan on the stove is not sucking electricity during the start up procedure and only close the lid after the stove has become hot. For the shut down procedure, I make sure the temperature setting is again at its' maximum for at least 15 minutes prior to pressing the switch to turn the stove off. I keep the lid closed during the shut down, so the fan can "do its' thing" to cool the stove off. (I believe the purpose in using the high setting is to ensure that all the soot is burned off the elements). By the way....after the stove is switched off, it takes approximately 15 minutes for the stove to cool off and the stove to completely shut down. That being said, when I'm heading North towards Everett, I turn off the stove when I pass the ferry landing in Mukilteo and by the time I get to the Everett Launch Ramp the stove is off.
P.S. I always have my engines running (or we are plugged into shore power) when starting the Wallas because it does take a bit of electricity to start the Wallas.