Probably shouldn't be posting this but I work for B&Q and saw in tonights price change that Castrol Magnetec diesel oil is going up a couple of pounds to £25 tommorow.

However the head office price file transmits to all stores - and the petrol magnetec has been reduced to £10 for 4 ltrs.

If you do your own oil changes get down there early and get it, Ive locally set our stores price back up as its obviously a mistake but I seriously doubt anyone else will have spotted it or done anything about it.

When pricing dept notice they will issue an emergency price change and it will revert to something like the diesel price.