Well, now that it is summer, I'm running a 50/50 mix of Mobil 1, AFE, 0w20 and Mobil 1, 15w50. My fuel economy has really been outstanding with this blended mix, with no engine noise and smooth running. The Mobil 1, 15w50 is high in ZDDP and the base stock of this oil quite a bit of PAO, from what I have read. IMO....this blend of Mobil 1 oils, thus far, has been my best summer mix yet.
3 Quarts of AFE 0w20 with 3 quarts of 15w50, along with an oversized Mobil 1, spin on filter, has worked out fine for the summer heat. The blended mix may even work fine for winter runs. But only time will tell me that for sure. Maybe 4 quarts 0w20, EP with 2 quarts of 15w50 might run better in the dead cold of winter.