What brand oil do you use?

I don't like changing oil so I use AmsOil and run it 15,000 miles between changes. I figure my truck will be about worthless by the time it is 10 years old regardless of how I treat it and in 10 years I doubt I could wear the engine out with the amount of miles I put on a truck. If I was bent on changing oil every 5000 miles I would use a less expensive diesel oil. We use Rotella T triple protection in our other equipment and most of it runs very hard and under severe conditions for 600 hrs between changes... as per manufacturer's recommendations.