The Texaco petrol station on Hollins Road remains taped off at present.
At around 11.20pm, two men approached a silver Skoda parked up in the petrol station, police have said.
Gunshots were then fired, before the two men fled the scene.
The five people in the car also reportedly fled from the scene.
They returned to the petrol station later in a bid to retrieve the Skoda, which police believe was stolen.
Enquiries are ongoing.
Anyone with information is asked to call Oldham CID on 0161 856 8962 quoting ref 3390 of 13/05/21; or Crimestoppers, anonymously, on 0800 555 111.
