Both me and my wife do not have far commute for work maybe 10 miles max one way, and we mostly do city driving. I know typically the recommendation for severe OCI is 3,750 miles or 3 months. But, I always run full synthetic oil so I typically run 7,500 mile oil changes. So my question is should I keep my OCI the same or adjust it? because recently I hit 6 months and had only clocked ~5,500 miles, so I went ahead and changed the oil. Thanks for any insight!