Skip Springer demonstrated how thieves can hack your credit card information.
“They actually stuck a screwdriver between the door and pry it open,” Springer said.
Skimming devices are installed so customers can't spot it.
"Then shut it back and ran a screw into the corner of this right into the frame of the pump to hold the door shut,” Springer said.
An attendant found a memory stick wrapped in electrical tape inside the pump during a routine weekly inspection.
"It was between the card reader and they also had it wired into the standard old-style PIN pad, so they can pick up what was coming through the card reader and any PIN codes associated,” Springer said.
Thieves may have had access to thousands of customers’ credit card information within seconds.
"Credit card numbers get stolen, then they're sold on the market,” Springer said.
"Our company has invested seven figures in putting this equipment in,” said Tome, president of Mark Oil Co.
Tome said if you're paying at a pump with an elevated keypad, it’s upgraded equipment.
Software is being developed to work with the upgraded equipment that all gas stations are expected to have by 2020.