If that's the case it's a fake issue because eventually prices come down and they get stuck selling gas at a low price made from oil they paid a high price for.
“””that oil companies buy the oil at market values, refine it and sell it (at a later date after refining and transport)”””
Contrary to what you wrote, the oil companies do not have massive storage tanks to play the market for a higher price.
It pretty takes 30 days for domestic oil production to go from the wellhead, through the refinery, and into a gas station tank.
For foreign produced oil it takes 60 days.
The oil industry pretty much operates on a constantly flowing pipeline from below ground to the nozzle inserted into your car.
Their profits are driven by the price of oil. It does not cost them any more to get it out of already sunk wells now than it did under Trump. The big difference is now they get more for it.