Best Day to Fill Up in Adelaide — Unleaded 91

Average unleaded 91 price by day — Adelaide

★ Cheapest day based on available observations. Prices sourced from Bill Hero's fuel price feed. Updated every 4 hours. Independent — no advertising, no commissions.

Price premium by day of week

Each bar shows how much more expensive that day is compared to the cheapest day. The cheapest day is always 0%. Sunday is the cheapest day in this area.

Frequently asked questions

What is the cheapest day to fill up in Adelaide?

Based on 47 unleaded 91 price observations in Adelaide, Sunday tends to be the cheapest day to fill up, averaging 164.2 c/L.

How much can I save by filling up on the cheapest day in Adelaide?

Filling up on the cheapest day rather than the most expensive day in Adelaide could save approximately 5.7¢/L based on current observations.

How often is this day-of-week data updated?

Bill Hero's fuel price feed syncs every 4 hours. The day-of-week pattern shown here is calculated from available observations each time the page revalidates.

Does the cheap-day pattern apply across all of Adelaide?

The pattern is computed from fuel prices recorded across multiple postcodes covering the Adelaide metropolitan area. Individual suburb prices may vary — check the suburb fuel price pages for postcode-specific data.

Is this fuel price analysis independent?

Yes. Bill Hero is an independent comparison service. We are paid by subscribers and concierge fees, not by fuel retailers. The analysis reflects observed prices without editorial adjustment.