here in croatia we have accents with 500.000 km thats i think
350-400.000 miles.... with only regular services... and thats it... few of them did get to 600.000 but then theny only made changes to all rubber stuf on the enging, and they run normaly again... they are in use at one security agency ... and practicly work 24h a day... the only turn off enging on shift changes, regular service, and when puting fuel in :-) so i guess you should have no problems for a long time...
one of my good frineds just went to extend registration (with hyundai pony 14 years old 533 000 km) , and we have testing every year, and for polution.. you could get your car banned from to road if it does not passes eco test.. but it did pass every test and it had only regular services... :-)