I just bought 2x5L Millers 10W 50 NT+ which is this years latest spec from here. Cheapest price and great service.
http://www.ebay.co.uk/itm/Millers-C...210171?hash=item2ee481d77b:g:-bgAAOSw9GhYi1pE
http://www.ebay.co.uk/itm/Millers-C...210171?hash=item2ee481d77b:g:-bgAAOSw9GhYi1pE