An oil changing regimen has 3 variables:
1. The Oil
2. The Filter
3. The Interval Between Changes
The Oil: Analyzed into the ground. Flipped upside down, held up to a bright light, and analyzed into the ground again. (rinse, repeat).
The Filter: Not that many manufacturers. Many filters differ only by the name on the outside.
The Interval: Always the most overlooked of the three. It's simple. More often = better. Even if you have the most wunderbar oil and filter on the planet, accumulated particles in the oil will be putting a big hurt on your engine if the oil is not changed. This includes tiny pieces of metal - some ferrous, some not. (re: magnets). No filter will grab all of them. I cannot fathom changing at 15k intervals vs. 3-5k. A great many 'manufacturer's recommendations' should be 'highlighted' with a black permanent marker.