Random Musings : After looking at BITOG VOA's & UOA's you see a trend with the D1 / Gen 2 compositions : *Moly *Titanium *Boron *Calcium *Magnesium All the D1 / Gen 2 oils now seem to have similar make ups now - the exception (as I see it) being whether Titanium is used or not and secondly - how much Moly is contained as well as what kind of Moly is used ? More Boron appears in the so called Tier 1 oils as well as the use of Titanium ... Calcium and Magnesium appear to run fairly similar among the D1 / Gen 2 rated oils . *As stated before here - a VOA / UOA doesn't tell you everything about an oil composition but as I see it - the below is how I would rate the current crop of WM bought popular D1 / Gen 2 Synthetic 5W30 Oils (based again on BITOG VOA's & UOA's) : 1A. PP 1B. Castrol Edge (non - EP version) 1C. Valvoline Advanced 2A. QSUD 2B. Castrol Magnatec 2C.. *Mobil 1 (non - EP version) 3A. Super Tech 3B. Havoline *On paper M1 vanilla appears to be absolutely nothing special for a 5W30 D1 / Gen 2 rated synthetic oil ? ... I try to give M1 the benefit of the doubt that there must be more to the composition than what shows on paper ... The first and 2nd tier D1/Gen 2 oils may be closer together in composition than at any other time of oil ratings.