Based on your mail address I assume you are located in Denmark.
Forget the Nikasil horror stories, if the car comes from Germany or
otherwise continental Europe.
The high sulfur petrol was only a problem in US and UK and some other (South
I drive a 09/92 German car that was brought over to Estonia in 1996 and has
had russian petrol ever
since. I now have passed 270000km mark and no signs of compression/power
Engine is generally in original condition (chain, cams, whole crank-piston
group). Only major things I've
done on it (apart from routine maintenance) are: water pump, thermostat, fan
clutch, crankcase ventilation
valve, air mass meter and O2 sensors. The clutch, cats and exhaust
(stainless steel!) are still originals.
What you should do though, is to check on the oil pump that is known to get