The Pennzoil 15W-40 is also an excellent oil. I would rank it better than the new Delvac. Pennzoil uses a very pure basestock (Group II) with a low pour point. Its CCV is a bit higher than Delo 400 15W-40. If I remember right it is 3500 cP at -15 deg C (vs 3150 cP for the Delo 400).