Okay, I am a GC Green user, but, I have never used the Gold. I love the Green, it works well for my VR6 Jetta. But, it is hard for me to get to Autozone, and there is an Advance Auto Parts about 1/2 mile from my house. They carry Mobil 1 0w40 SM for the same price as GC. I have seen many good UOA's of the Mobil1, but, a lot of people on here bash it. Why? I know that it loses it viscosity a little, but is still usually a bit heavier than GC. So, knowing that, and accepting that, what makes this oil bad? Why is it not as good or better that GC. I know the elves didn't brew it, so I guess what other reason is it not as good?