Races in calendar week 40/2018
All motorsport events on the weekend of 5–7 Oct 2018.
| Circuit | Country | Series |
|---|---|---|
| Bathurst |  Australia |
|
| Dover (oval) |  USA |
|
| Jerez |  Spain |
|
| Nürburgring (Nordschleife) |  Germany |
|
| San Nicolás |  Argentina |
|
| Suzuka |  Japan |
|
| Wuhan |  China |
|