Glow-plugs.. ball-park reference

Note that I purposely posted this in the "non-Cox engine" section... but if you have experience with a Cox engine that uses a head-adapter for a non-Cox plug; then feel free to include your experience. I wanted to start a thread on what glow-plugs run reliably in certain engines.. under certain conditions.. while attempting to make the thread easily-searchable. Maybe listing "your engine and its use" in the title of the topic box would help with searching the thread.

Not having much experience with glow-plugs myself; I'll leave it up to others, to contribute their experiences initially. Try to provide info. specific to plug-performance in a certain engine.. for a certain use. The fuel-blend/brand used.. condition of the engine.. anything that might help another modeler to get their engine running. Thanks!