Just came to post this again. Not sure if its the same offer but 4L of 5w30 Edge is currently £27.99 on ECP if you use discount code OILBONANZA30 or OILDEAL30 at the checkout. Very good deal, ordered some for my upcoming service. 4L should be more than enough for a complete oil change (correct?)
You need to check out their site more often. It basically been this price on and off since I started using them a couple of years ago. 5w30 that is.
I buy a quite a few things from there and their "so called" sales are a joke as they are the price the majority of the time. Not complaining just surprised they haven`t been pulled up for misleading advertising.
Even when they don`t have a sale its always easy to find a dscount code online giving 25% off parts.