After much reading on here for the last couple of years, I decided to fire Mr.Mobil 1 and go with GC.As luck would have it I got it on sale today for 4.49 a qt., so I am off and running. Hopefully my 01' QX4 will enjoy it as much as I have been reading about it.I think I have the Gold GC...so hopefully I get good results.Thanks for all the helpful info you guys give on here!