Look at the test results! After many miles of use engine parts still have the machine marks, other oils machine marks are gone and wear is present. Besides I use about 20 oz of Lucas synthetic oil stabilizer with each oil change. I love that stuff as well. Can be used as an engine assembly lube. Eliminates dry starts. I swear since my last oil change and I installed the Pure Power oil filter and the Lucas my bike definitely runs smoother and stronger. Call me crazy but I really noticed the difference. Like I said next oil change I'm going 1 step further and using Amsoil.