Ive hurd the 4.7s have small oil passages and heavy oil can restrict pressure? I was wondering if i can run 10/30 in the summer months? Im running what it calls for right now cuz its cold (5/30). Will the 10/30 disapate more heat in the summer time? The only reason i ask is cuz i can get 10w/30 part synthetic from work for free!
Im running mobile 1 full synthetic right now