My wifes 04 Caravan is due an oil change. It is currently running Mobil 1 10w30 with 4000 miles on it. The van has 6800 miles on it and I was wondering if I should keep with the Mobil 1 10w30 or switch over to the GC 0w30? The GC has been running good so far in my 4.7 Dakota. Thanks in advance...