Did you read the papers, which came with your certification?
This is the key. The required (approved) fuels will most likely be specified by the standard with which they are to comply. For this reasons, an STC from one authority might not be what you need in another nation, as the standard specified for the fuel approved might be a standard which is not applicable in the other nation, and therefore, you cannot obtain approved fuel in that nation. The actual effect on the engine and airframe will probably be negligible (other than for the possible presence of ethanol).
"Mogas", "Autofuel" and "Autogas" are more colloquial terms, and might be used somewhat interchangeably. It doesn't really matter if you're using gasoline which meets the specified standard.
engine runs a bit hotter compared to Avgas, so you have to keep an eye on EGT/CHT.
Some Mogas has a very slightly greater energy content than Avgas, so this might be a small factor, but I would be surprised to find that the effect was noticeable on EGT/CHT. I don't worry about it.