I have just changed to propane for the winter holiday, just in case things turn really cold. I have a 2004 caravan with fitted regulator. After a trial over the weekend the gas pressure became reduced on night 2 leading to an early morning attempt to change back over to the butane. All was Ok for an hour but I was left with poor pressure once again. I have been told this is due to oil getting in the regulator ??? now need to be chaged at my cost despite taking prior advice from the dealer on using propane. Has any one had similar?