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The reason for the early filter change is that synthetic oil will dissolve all the nice brown varnish inside the engine, and release all the crud stuck to it. Withing 1000 miles, the engine will be shiny clean inside, and the oil filter will be plugged. Nothing wrong with the oil, but lots of dirt will circulate around the filter, so replacement is required.
Short change interval first time round isn't a bad idea, either, as some of the crud will go through the filter anyway.
Peter
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1972 220D ?? miles
1988 300E 200,012
1987 300D Turbo killed 9/25/07, 275,000 miles
1985 Volvo 740 GLE Turobodiesel 218,000
1972 280 SE 4.5 165, 000 - It runs!
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