Keep in mind that approval process is not about longevity of oil in the sump. It is just one of the parameters. Important for you is how compatible that oil is with your uber expensive emission system? I personally would never use non-approved oil and in this case you want to go with oils that have multiple approvals, like ACEA C3 MB 229.51, MB229.52, BMW L04, VW 511.00 etc. and as heavy oil as possible. That is why that Motul for your particular application is good, bcs. of very high HTHS but also compatibility with emission system.Ok thanks. I have used Schaeffer for years. It’s easy to pick up with the factory on Barton St in St Louis. How often do you change your oil? I appreciate the help. I think I am going to just use Schaeffer.