Best Day to Fill Up in Adelaide — Unleaded 91
In Adelaide, unleaded 91 averaged 156.6 c/L on Fridays vs 169.9 c/L on Saturdays — a difference of 13.3¢/L (based on 94 observations).
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Average unleaded 91 price by day — Adelaide
| Day | Average price | Observations |
|---|---|---|
| Sunday | 161.1 c/L | 8 |
| Monday | 166.5 c/L | 8 |
| Tuesday | 163.1 c/L | 63 |
| Wednesday | 157.6 c/L | 4 |
| Thursday | 157.9 c/L | 1 |
| Friday ★ | 156.6 c/L | 9 |
| Saturday | 169.9 c/L | 1 |
★ 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%. Friday is the cheapest day in this area.
* No price data available for this day
Frequently asked questions
- What is the cheapest day to fill up in Adelaide?
- Based on 94 unleaded 91 price observations in Adelaide, Friday tends to be the cheapest day to fill up, averaging 156.6 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 13.3¢/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.
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