Races in calendar week 18/2008
All motorsport events on the weekend of 2–4 May 2008.
| Circuit | Country | Series |
|---|---|---|
| Brands Hatch |  Great Britain |
|
| Brasilia |  Brazil |
|
| Jarama |  Spain |
|
| Mugello |  Italy |
|
| Okayama |  Japan |
|
| Richmond (oval) |  USA |
|
| Spa-Francorchamps |  Belgium |
|