The table below is a live Power BI report showing daily ranking of the fuel stations (1 being the cheapest station for ULP in Perth metro, 371 being the most expensive) for the current week*.
Below there is a screenshot of this report for the week ending Saturday 8 June 2019.
A couple of points to note:
The three cheapest station this week are : Caltex Woolworths South Lake, Caltex Woolworths Osborne Park, and United Southern River.
For theses 3 stations, there are among the cheapest every day except one day. Caltex Woolworths South Lake, Caltex Woolworths Osborne Park are in the top 20 every day except on Sunday 2 June where they rank both 78. United Southern River is also in the top 20 every day except on Sunday 2 June where it ranks 157.
The distributors with a station in weekly top 10 are Caltex Woolworth, United, 7-eleven, Better Choice and Vibe.
Looking at the bottom the table (i.e. the most expensive fuel station this week) BP seem to be overrepresented.