Please explain your answer.
It's possible, but I don't see it as a singled-out, primary factor. Some improvements by themselves would be unnoticeable. The government did a study of oil intervals - in an attempt to figure out how to stretch them longer. There's a good bit of interesting reading on the site I posted below. I use Engine Sentry in my Harley, and my car and truck. (Looking at the first one I ran through my Harley was scary and it got me doing it to all my vehicles.) You've also gotten some good sites above this answer.
