These OCI's I continually read about here on BITOG are astonishing to me because of my experience before coming to BITOG. I began using Mobil One back in the 70's when it first came out, and it was said to be good for one year or 25,000 mile OCI's. I took them at their word, and a one year OCI it was, up until I retired in 2001. One year was usually 18,000 to 20,000 miles. I usually had to add 2 or 3 quarts of oil per year. This was why M1 quit advertising 25,000 mile OCI's, by the way. Many people were not checking their oil level and were running out of oil and ruining their engines.
My engines always stayed clean and quiet up to 140,000 miles, which was seven years, and about the longest I ever kept a car. When I retired in 2001, my driving fell down to about 5- or 6 thousand miles a year, and I began to use regular dino oil, changed twice a year. I just couldn't see wasting good synthetic driving only 6,000 miles a year. I still use Mobil 1 in my lawnmower, however, with a one year OCI.
Inasmuch as PP makes no claims for mileage, and is not PAO, I do not know what to think about it. Changed at 5,000 mile intervals, regular dino will give 200,000 to 300,000 miles in most cars. I used M1 back in the day to get a one year OCI regardless of the miles. My belief is that unless you have a turbocharged engine or a known sludger, unless you are doing extended OCI's, there is no point in using synthetic oils.