Ōroran Endurance Championship
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| Category | Endurance racing |
|---|---|
| Country | Ōrora |
| Inaugural season | 1977 |
| Classes | OECh, OEC2, GTE |
| Engine suppliers | Honeda · Kuga · Obey |
| Tyre suppliers | Ishibashi |
 Current season | |
The Ōroran Endurance Championship is an Ōroran endurance motor racing championship organized by the Ōroran Motorsport Association. The series features multiple classes of cars competing in endurance races, with sports prototypes competing in OECh and OEC2 categories, and production-based grand tourers competing in the GTE Pro and Am categories. The OEC Champion titles are awarded to the top-scoring drivers, manufacturers, and private teams at the end of the championship.