I sent a couple questions to Mag1’s ask the expert

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That's a lot of specs disclosed!

According to the data, the base-oil-quality index BOQI = 52.4. It's probably Group III+, not GTL.

Compare this BOQI to the BOQIs of other 0W-20 oils.

Interestingly the 2014 MAG 1 0W-20 formulation had BOQI = 41.8, which was almost at the very bottom of the list. They have improved things a lot with their new formulation and they are now up to the level of the Valvoline SynPower but not up to the level of the Pennzoil Platinum and, of course, nowhere near the level of the PAO-based Mobil 1 Advanced Fuel Economy 0W-20.
 
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