Redline produces 5w20 also. I used it, but it's not worth it. 5w-30 is still the prefered oil. The 5w20 is only beneficial for colder weathers...in where I live (sunny san jo) it's not really necessary. 5w-20 also will not offer the same protection to your engine as 5w30 is and even though Honda/Acura recommends it, I would go with 5w30. I'm currently using that in my car...Redline 5w30.