So me and the family went on a trip of about 5000 miles or more. The day before the trip the Tahoe(2003) oil system asked for an oil change and so I did. After the oil change I reset the oil life on the Tahoe but the oil is rated for 3000 miles (5w-30). It has not ask for an oil change yet but just wanted to know how the oil life system works or if it can be reliable. I usually change the oil in the other cars wen I reach the max life of the oil that is indicated by them.