Diesel is what they call long at the moment......plenty of it in the refining system looking for a home, the main reason being that the heating market is all the way down being summer and there's no real alternative like converting it into another product. Some of the diesel is also fueled by aviation kerosine being downgraded, usually because of water in it and planes, water and 35000ft do not mix....so with plenty of aviation fuel being blended back, that market in full tilt, then that exacerbates the problem.
As to crude prices being up, me don't think so....see attached.
http://www.nasdaq.com/markets/crude-oil-brent.aspx
Remember one of the reasons that we don't see the same scale effect on end pump prices is that huge whack of excise duty the government takes and they even have the audacity to put VAT on the tax......that doesn't change that much and is a bit of mattress to the end retail market.