If your vehicle requires premium, comparing ULP 91 “cheapies” is irrelevant. Start at Fuel types if you are unsure what the grades mean.

Pick two stations you would actually use this week — same grade, same day — and compare listed prices on their station pages via the directory.

Use ranked suburb listings (for example Petrol prices VIC — Sunbury) to see whether your usual site is an outlier.

If many stations jump together, you may be seeing a reset phase. Read Melbourne fuel price cycles and the best time to buy petrol in Melbourne guide.

Finally, sanity-check spatially on the map before committing to a long detour.