Why Are Diesel and Petrol Prices So Wildly Different?

I'm really confused about Diesel pump prices!
We are soon to receive a diesel car so I have taken a keen eye to pump prices.

Often at places like BP and Caltex, Diesel is on average 12c less per litre. But then I go up the road and another place has it for a few cents more.
Even the same chain seems to wildly show different prices in terms of whether diesel is cheaper or more expensive than Petrol.

Is this normal?

Comments

  • +1 vote

    Diesel market is largely set by big industry. The amount used for passenger cars isn’t much in comparison to everything else using diesel (trucks, trains, plant and equipment). The price doesn’t fluctuate like petrol although it does rise and fall, just not like the old weekly discount cycle for petrol.

    Sometimes petrol is more, sometimes diesel is more.

    Diesel is also refined differently to petrol, so there is a supply price difference as well.

  •  

    Having owned a diesel car for about 18 months now, I've found sometimes it's more than petrol, other times its cheaper. Generally because petrol fluctuates all over the place and diesel rarely changes, usually only by a few cents and much less often.

    At least you don't have to plan around filling up on a certain day of the week, like petrol. Also you should be using roughly 30% less diesel than the same petrol vehicle.

  •  

    In my part of world, Inner East Melbourne, it seems diesel is always cheaper than unleaded 91.

  • +1 vote

    @ diesel drivers - would you go back to petrol for your next vehicle ? Or would you like your 2nd car to be diesel too ?

    •  

      We had a diesel (Mazda 6) and just went back to (turbo) petrol (Golf Wagon)

    • +1 vote

      Depends what you need/want from a car. Our two are diesel, but 4wd 7 seater used for towing and twin cab 4wd ute. Small or performance car I’d have a petrol. Actually, Small or performance I’d prefer electric.

    •  

      I certainly would, but all that torque is addictive so I would probably look at turbo or hybrid.

    •  

      Only if it was turbocharged and/or had the same torque as the diesel. Ive got an '08 Hyundai i30 diesel. Its not a fast car, but the torque makes it feel quick and I like that I dont need to fill it up too often.

    •  

      I have a diesel. I'm lazy and hate filling up. Diesel means I have to fill up less - I love it.

      I have however been seeing increasing arguments against diesel from an emissions point of view so would take this into consideration and do research before jumping in again.

  •  

    I have a diesel car & I love how much more mileage I get out of a tank than petrol does. Power has improved tremendously with the common rails but the maintenance part is higher than in a petrol car & you gotta know what your doing.