Does the US have a blanket sales tax in certain places ? The UK builds VAT into the price and it varies because it depends on the item . Fresh fruit isn ' t taxed for example , but a chocolate bar is for obvious health reasons . It does actually list the tax on the till receipt usually . <| sep |> Wasn ' t me . I ' ve found over time that people come in here and downvote any questions they think are stupid or they should know that , duhThe oil being sludgy could just mean it ' s terribly old , or could be water contamination . I ' d just change it out with pump oil , run it for a couple hours , then change it again . If it keeps sludging , there might be a leak letting water into the case somewhere . <| sep |> What a damp squib .