Races in calendar week 16/2008
All motorsport events on the weekend of 18–20 Apr 2008.
| Circuit | Country | Series |
|---|---|---|
| Curitiba |  Brazil |
|
| Hamilton |  New Zealand |
|
| Long Beach |  USA |
|
| Mexico City |  Mexico |
|
| Motegi (oval) |  Japan |
|
| Oschersleben |  Germany |
|
| Silverstone |  Great Britain |
|
| Vallelunga |  Italy |
|