I think the new Mobil 1 is much better then even the Mobil 1 of the fairly recent past. I still remember the first time I tried Mobil 1-it seemed to be too thin in my car engine and I had to use 10W-30 instead of 5W-30. I changed oil today with Mobil 1 5W-30 and 3 oz. of Auto-RX. The engine ran very smooth. From what I can sense, from what I can feel and hear, Mobil 1 is better. And without question the Mobil 1 5W-30 will flow in the cold. There was a night not too long ago when it reached -16. Not exactly Minnesota but cold just the same. In the warmer months I don't know if I will stick with Mobil 1 or maybe try the new Mobil Drive Clean Plus. Mobil 1 should protect well in the heat also, especially if I add a little Schaeffer's #132.