oil isn't what it used to be

[christy]

We made a big mistake in 2000 taking out our much loved solid fuel Rayburn and installing an oil-fired Rayburn 368 (formerly Nouvelle) so that we could return to a warm cottage after going away for a couple of days. Since 2005 we have experienced a catalogue of problems - ignition, new boiler, new burner and more services than recommended - a total expenditure of well over £3,000.
Everyone we speak to, Engineers and owners, has horror stories including stoves going out, blocked fuel lines, copper deposits on wicks, sooting up and, in one case, an explosion which blew off the cast iron door! (not an Aga).
Theories include the huge glut of aviation fuel after 9/11 resulting on the oil companies flogging the excess onto the fuel oil/ kerosine market, and the EU low sulphur rules. I have a friend in the EU who sent the whole directive which shows the allowable sulphur content has been reduced over several years from .2% to .05%. One engineer used the phrase 'instead of the carbon going up the chimney, it is deposited in your burner'.
Aga/ Rayburn seem to be keeping quiet for fear of damaging their valuable brand, merely suggesting more frequent servicing, but I feel we should be told if they have plans to modify their stoves to take account of the new fuels.
Has anyone else had similar problems?