I had a Viscometer at my workplace. Checked virgin vs used sample. Both allowed to come-up/come-down to room temp before measuring. I wish I had my results still, but I wasn't impressed, especially compared to the M1 FS UOAs I saw on this forum. Maybe it's me and my driving style and car, and others get great performance from the LM, I do not know. I even swore by the LM in my Volvo in the past and had nothing but good results.
Based on feedback and other forums, I'm going between M1 FS Euro 5W40 for of the shelf stuff, Motul 8100 Power 5W40 and HPL Euro/Supercar 5W40 for a boutique oil. I see that the Motul has some good deals right now and is also on FCP Euro for their Lifetime Warranty trick if I wanted to pay more upfront...