Was studying some of the Exxon-Mobil SDSs, and one of my searches on their site produced this result. Notice the one that I've got highlighted. It does not appear to be marketed in the US, and a bit of further research seems to indicate that it's a UK-only product. The limited "stats" that appear on the EM site don't appear to reveal anything unusual, except that it's probably NOT one of the PAO-rich formulations (like AP and EP). This is just an "academic" question, but does anyone see something special about this "apparent UK only" product that I'm missing (I'm no chemical engineer, of course!)? Mobil's description of the product appears here.