Just thought I'd see if anyone has experienced this...

I filled up on Wednesday last week at a Coles Express servo with 98RON, but my fuel consumption and seat of the pants dyno makes me believe I was actually given something else with a lower octane rating instead (95 or 91).

Has anyone had this occur to them? If so, did you do anything about it?

I have the receipt for the fill up, which includes the bowser number on it, but I have already refilled my tank. I plan on having a chat to the staff next time I go there to ask them about it, but thought I'd see what others experiences are first.