I use Fuel Check https://fuelcheck.nsw.gov.au/app/FuelPrice 

Yesterday the petrol varied between $143.9 to $157.9 p/l

which as you can see makes a substantial difference on a tank of petrol over a period of time.

I use my eyes while driving to check prices, and I know which brands are usually cheapest, also taking discount coupons into account. I bought for $1.29.5 a couple of days ago while most were selling 10-20c above that. In SA usual cheapest are X Convenience, Woolworths Caltex (or Ampol sometimes), United, On The Run, Liberty (if you tolerate E10), with Shell generally dearest.

The international per barrel prices up to about 40 years ago were often much higher than what they are today   See here https://www.macrotrends.net/1369/crude-oil-price-history-chart.

So we are being ripped off in a massive way 

I rest my case !!

Prices shot to 50c per litre in the mid-1980s, beyond 70c in the 1990s and the $1 mark was breached not long after.  

https://www.drive.com.au/news/friday-flashback-fuel-prices-change-forever-20130816-2s0sm/

Because fuel is often the largest single purchase many people make each week, the price is one they are painfully aware of. seniordriveraus tracked the price of fuel over a three month period and could discover absolutely no correlation between the price of crude oil or the value of the Australian dollar. The only constant was an increase before public holidays when more people would be driving. Read more here

The 4c/ltr discount at the big steal fuel outlets  is a joke, I can always get a better price at the independent servos without the discount. It is nearly always the same product as well.

The weekly fluctuation in price is a joke, if it happened anywhere else, like USA and Europe to the same extent as here there would be riots.

We Aussies are dumb ar**es to put up with this immoral conduct.

The best way to save on fuel is, as BillW41 else said, your eyes, The fuel watch apps etc are not much good if the show prices cheaper at a big distance from where you are anyway.

The next best way to save money on fuel is NEVER, EVER use E10, it is false economy because the price difference is too small and you use more fuel for the same distance traveled, It is also hydroscopic and if you are not using a lot of fuel it absorbs water and causes rust and water build up in the tank. It has killed a few cars with expensive repairs.

E10 means up to 10% ethanol, whoop de do, does nothing for pollution any way because you use more fuel, Watch the greenies follow up on this.

With COVID, cars are sitting around more and it will certainly do damage.

It is always better to use the most expensive fuel you can afford if only doing short trips, its better for your car and you will use less fuel in the long run.

Here in Tasmania, our current fuel price, as at 16th September is 158.9 cents/litre. The variation  from one place to another would be around 1 (one ) cent. Around a year ago, it was 156.9/litre, which was the price over the whole state.then dropped suddenly to 126.9 After quite a few months, it  suddenly jumped to 133, then 144, then 148, 152  and now 159.9.  I agree with Oxleigh about E10.  You do seem to use more. I only used it once , never again, waste of money .

Regional seniors travel card provides eligible seniors living in regional, rural and remote areas of NSW with a $250 prepaid card to help ease the cost of travel.

You can use the card at certain retailers to pay for pre-booked NSW Trainlink Regional trains and coaches, fuel and taxis.