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I have a 650RWHP Mustang (coyote engine). I'm currently using Amsoil SS 10W30. The vehicle is driven 2.5K per year very spiritedly. Used to use Penz Ultra Pre GTL reformulation. What compares to the SS with its low Noack (5.3). Superior protection is my priority. Thanks for your input.

I've recently supercharged my coyote engine (2011 Mustang 11950 miles). I'm running a mild tune and boost and it's hitting 625 to the wheel. I'm on my last Penn Ultra oil (pre gtl) change and am looking for a recommendation. Stick to 5W20 or go up in weight and any particular flavor Penn...

I have searched and read countless threads on 5W 20 oils. However they have centered on nissan/toyota's and modular ford v8's. My question is what is the preferred choice for a 3.5 6cyl in a ford fusion, 5W 20 or 0W 20? And which brand. Before finding this site with so many SME's on oil I had...