A news report I watched a few weeks ago showed how clever swift crooks are going into car/SUV doors at service stations while drivers/customers are distracted.
The take-away is to get fuel at well lit/well run stations with plenty of open space to deal with or ID any threats.
I secure my vehicle & pay inside whenever I can. Then I pump the gas & split.
The longer you take at a gas station or mini mart, the longer some street thug(s) have to decide to jump you or make a move.