I just changed my oil and switched from Motul 5100 semi-synthetic to Motul 300V full synthetic and just came back from a little ride. I can definitely tell a difference. Bike shifts smoother and I hope it runs a little cooler. I will find out Monday when I commute to work. My bike also seems to pull a little harder. All in all, I believe its worth the extra $4.00 a liter.