Obviously, check the UOA section to see if anybody has any reports on GC from your engine. But beyond that, I don't see why you shouldn't use it. I'm getting ready to make the switch from Mobil1 to GC. I've used Mobil1 for 85K miles in my 100K mile Grand Am GT. My engine is spotless. So, I really think highly of Mobil1 but I also like change and I've heard enough good things about GC that I'm willing to give it a try.