nope
The cost of fuel entering the market is determined by the exchange in the Netherlands.
The cost at the pump bears no relation to the current costs of what you mention. This is highlighted by a forecourt very close to my house (2 actually). AN independent (which means higher costs!) is selling petrol and diesel at £1:38.9. per litre Price parity between the two main types. 300 yards up the road is a main branded garage (though still technically an independent company but tied by brand to an extractor), diesel is $1:59.9 per litre and unleaded petrol is £1:45.9 per litre. The prices for both fuel types after refining at the market is roughly equal in the current market, the price at the pump is wildly different and well over what the raw markey price is
The two cheap forecourts are selling fuel at just above the pre-war prices, which is just about correct for the market price of the refined product.
What seems to be happening is that pre-war the supermarkets undercut the forecourts to encourage people onto their property, they no longer see the need to do that and have decided to increase their profits at the pump and the forecourt companies are just pricing their product a few pence above the supermarkets because that is what people are used to. They are both making much bigger margins than previously as a result.
So, definitely a No