Thanks!
How can the percentages fluctuate that much?
Does your electric bill percentages or phone bill percentages fluctuate that much?
It appears completely rigid.
Gasoline is a commodity, just as is crude oil, diesel, kerosene, etc.
The market demands for each do not all move together equally. Some larger general trends will be the similar, but not exact. Month to month can vary a lot.
Keep in mind, these numbers are not actual cost, but price differences.
The Price of the crude oil.
Price adder for the Wholesale Gasoline.
Price adder for the Retail Gasoline.
Price adder for the taxes at retail sale.
If the market is competitive, profit margins at that stage will be smaller.
If crude stocks are higher and gasoline stocks are lower the margins tend to move from one to the other.
At the same time diesel, kerosene, heating fuel, petroleum coke, naptha, etc all have differing demands that do not move equally. Sometimes the refinery makes more of their profit in gasoline, later in diesel, etc.
Does your electric bill move precisely with the price of coal, natural gas?
Again, look at the chart in post #15. Gasoline didn’t rise as much as oil (percentage) so why do you expect to fall by the same percentage?