Greetings all and a belated Happy New Year to you! I came across this SOPUS link to the SN version of QSUD(http://www.epc.shell.com/Docs/GPCDOC_X_cbe_24855_key_140003587110_201007020123.pdf). For the 0w20 version, it states a VI of 175. I couldn't find the same information for the SM version and was wondering if someone here knew. I was able to find four more of these SM bottles ($4/each as mentioned here before) at a local Big Lots last night and that's why I'm curious. In fact, (and as you can notice below) I'm running it in my Marquis right now and the engine really seems to like it! (Especially since we're having some colder weather here now. 19 deg F as I'm typing this) As always, many thanks for all your help and I appreciate it.