http://www.national.co.uk/
Can now book in on line and get for sam eprice as they offer when using the special offer vocuchers they print in tabloids.
£20 for Duckhams QXR semi is the same price 5l will cost you in a shop so you get the filter and no hassle for free. Well worth it in Winter or for a Valver/Willy.
£25 gets you BP Fully Synthetic.