Your oil distributors in the UK make you anti-advertising. I wanted to buy Amsoil 5w30 Singnature, I asked many British distributors and official representatives of your oil about the production date. Nobody wants to answer me. This is sick and bad. The customer service department has your oil somewhere, it's a shame because I like it very much and I wanted to buy it. I will not decide to buy Amsoil oil without obtaining any information from a distributor or seller. Everyone has no time or has a customer somewhere. I will probably have to buy another oil, maybe Motula, at least the date of production.