Michael Fitzmaurice (Roscommon-Galway, Independent) | Oireachtas source

On petrol, when I was knee-high to a grasshopper, there was always a ten cent difference between the price of diesel and petrol. While Mr. McPartlan was talking I googled the number of diesel cars in Europe which has reduced since 2016. I also looked up the number of petrol cars but there does not seem to be much of a variation in the number of petrol cars. Mr. McPartlan spoke about refineries. It is my understanding that petrol is the highest grade fuel taken from refineries. Why has it changed during this period only? Why did it not change two weeks ago or two months before this bang came?