one thing a lot of people are forgetting is it is a hobby to some. Some of those guys are running the tests because it is enjoyable for them. Over on BITOG, it's a sickness how much people love oil( i mean that in a good way, I too enjoy that forum). Most people who are doing it probably don't need to, but they like to or feel it provides an added measure of protection.

99 rodeo 4x4 v6 80,000 miles
My Rodeo