My maternal grandparents lived in NB for a while (near Edmunston), and would come visit us in Montreal. They were Austrian, and always drove VW diesel engines. Somewhere around Rivière-du-Loup one time, the resident dingus at the gas station put regular gas into the tank. This was in the days of full service (am I the only one who remembers that?). I was young in those days, but I will always remember the time that Opa's car was ruined for that reason, and they didn't make it for their summer visit because of "car trouble."