Races in calendar week 18/2005

All motorsport events on the weekend of 6–8 May 2005.

Circuit	Country	Series
Barbagallo (Wanneroo)	Australia	Race results available (limited) V8 Supercar Championship 2005
Barcelona	Spain	Race results available (full) FIA Formula 1 World Championship 2005 Race results available (full) GP2 Series 2005 Race results available (full) Porsche Supercup 2005
Brasilia	Brazil	Race results available (full) South American Formula 3 Championship 2005
Croft	Great Britain	Race results available (full) British Formula 3 Championship 2005
Nürburgring (Nordschleife)	Germany	Race results available (full) 24h Nürburgring Nordschleife 2005
Pau	France	Race results available (full) Formula 3 Euroseries 2005
Vallelunga	Italy	Race results available (full) Formula 3000 Italia 2005 Race results available (full) Italian Formula 3 Championship 2005 Race results available (full) Italian Superstars Championship 2005