Missing Adelaide woman Colleen South spotted on CCTV at Sunraysia Petroleum at Berriwillock

CCTV images from a highway petrol station have added new details to the search for missing Adelaide grandmother Colleen South.

New information has been uncovered in the search for a missing South Australian grandmother.

Colleen South, who has been missing for more than five weeks, was spotted at service station on the Calder Highway just hours before her car was discovered abandoned on a rural Victorian roadside.

Courtney Rose shared a post to Facebook page – Bring Colleen South home – dedicated to finding the Renown Park woman home on Sunday.

Colleen South, 58, was captured on CCTV at Sunraysia Petroleum at Berriwillock on the Calder Highway on Sunday, July 3 at about 12pm. Picture: Facebook

Colleen South's abandoned 2006 Hyundai Getz. Picture: Supplied

“Colleen was captured on CCTV at Sunraysia Petroleum at Berriwillock on Sunday the 3rd of July at about 12pm,” the post read.

“She was then last seen heading South, towards Wycheproof.

“This was 4 hours before her car was first spotted crashed into the ditch just outside of Bunguluke.”

The post appealed for anyone with further information or sightings of the 58-year-old to come forward.

“Does anyone recognise this area? Did anyone speak to Colleen or sight Colleen between 12-4pm?” it read.

“Please check security cameras, or dashcam footage for any possible sighting of Colleen on or after the 3rd of July.”