"He looked to make sure there was nobody walking back to the car. So he suddenly jumped into the car and turned it on."
According to the manager, the victim became aware of what was unfolding and sprinted outside to try and drag the offender from the car.
"The customer who owned the car saw the person jump in so he sprinted to try and stop him and tried to grab him by his shoulders.
"But by the time he reached the person they got away. The car owner tried to chase him but he was too fast."
According to a family member of the victim, the offender drove off down Triangle Rd.
Inside the car was a range of painting gear. The number plate is AWJ872.
Police confirmed the incident and have asked any witnesses to come forward.
"Police are investigating a report of a vehicle being unlawfully taken from outside a petrol station on Triangle Rd, Massey.
"The incident occurred around 9.05am on Monday.
"Police enquiries are ongoing at this stage, including area canvassing for CCTV footage.
"Anyone who may have witnessed the incident or has seen the vehicle are asked to call Police on 105. Information can also be provided anonymously through Crimestoppers on 0800 555 111."