Well, my local Wally World doesn't carry the SuperTech 0W-16, but I noticed last week when I went to buy oil that they now have Mobil 1 0W-16. Looking at Mobil's specs, they have the same percentage phosphorus, but zinc isn't listed. Viscosity at 100 degrees C is 8.7 cSt for 0W-20 versus 7.2 cSt for the 0W-16.
I stuck with my usual Quaker State 0W-20 this time around (it's ~$7 cheaper per 5 quarts than the Mobil).
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