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.

Average price by day of week

Bar chart shows the average unleaded 91 price in cents per litre for each day of the week. The cheapest day is highlighted in green. Days marked with * have no recent price observations. Friday is the cheapest day in this area.

Frequently asked questions

What is the cheapest day to fill up in Adelaide?

Based on 2056 unleaded 91 price observations in Adelaide, Friday tends to be the cheapest day to fill up, averaging 205.9 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 6.3¢/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.