Oil was run approx 7300 miles, mostly highway, but with some hard, spirited driving on occasion. Used a Baldwin B35-S, which is an oversized filter (for the 4.3L trucks) for this application. This OCI took me through the coldest months, though we had a unseasonably mild winter this year. Can't really think of anything else worth mentioning, pretty run-of-the-mill interval. Switched this oil out for SM rated Chevron Supreme 10w-30 and a made in Germany Bosch filter.