I don't think it's just the station you went to. My girl's Corolla is having the same problem, i'm going to replace the fuel filter tonight. We filled up with V-power about a week ago, but haven't driven it until yesterday which is when it started playing up. A guy at work said he's been told there's a dirty batch of fuel in canberra at the moment and has been told to change his fuel filter about once a week until you get the tank empty, then use another fuel.