I was in B&Q the other day and I came across (4litre in small print ha ha) plastic cans of paraffin. I suddenly thought aha, one could use that to eke out the diesel? But when I divided the cost by four is was the same price as diesel.
So, as we all know, the cost of diesel (road fuel) is mostly tax, they must be making a hell of a profit on this paraffin.
It was in the gardening bit for greenhouse heaters BTW.