F1 Fanatic

What feat in F1 did Jim Clark manage to do on three occasions that no other driver accomplished once? Hint is it relates to a specific GP circuit.

Woops, forgot about this.

Simple thing would be to look up circuits that have only been used for championship F1 events three times. Other drivers like Brabham managed the same feat, but in non-championship events.

Not quite (Graham Hill won in ’62), but for peat’s sake I want rid of it. 3 pole positions there in championship F1 events. Nobody else managed one, although Brabham got one in 1966 in a non-champ event (Clark managed it in 1961 in a non-champ event as well).
@sigman1998 – your turn.

That would be Dan Gurney in Germany 1968. He finished 9th.

Michael Schumacher has achieved something twice that 13 other drivers achieved only once, most recent of whom is Vettel this year. What achievement is it?

@andae23 No. Hint: All of the other 13 drivers are world champions and it has to do with the years in which they won one of their championships.

Alright. Here are the other 14 (sorry not 13!) world champions and the years in which they won the title:
Juan Manuel Fangio: 1951, 1954, 1955, 1956, 1957
Alberto Ascari: 1952, 1953
Jack Brabham: 1959, 1960, 1966
Graham Hill: 1962, 1968
John Surtees: 1964
Emerson Fittipaldi: 1972, 1974
Niki Lauda: 1975, 1977, 1984
James Hunt: 1976
Alan Jones: 1980
Ayrton Senna: 1988, 1990, 1991
Nigel Mansell: 1992
Damon Hill: 1996
Lewis Hamilton: 2008
Sebastian Vettel: 2010, 2011, 2012

As I said before Vettel achieved this for the first time this year 2012, Hamilton achieved it in 2008, Damon Hill in 1996 and so on. What do the years 2012, 2008 and 1996 have in common?

@mathers Correct!