gsxr,

The REASON that dino oil, probably not just any old dino oil, can prevent chain stretch with thorough drain and filter change at 3,000 mile intervals is that the chain wear is caused by microscopic particulate in the oil. By draining often, you keep this particulate to a minimum, thus keeping chain wear at an absolute minimum.

In fact, using synthetic and changing at longer intervals could very well allow more chain wear than dino oil changed frequently. This could possibly happen because of the microscopic particulate that accumulates in the oil over time. The ultimate would be synthetic changed frequently, but not very many folks can afford that.

I'm not sure about your comment regarding your "questioning" whether or not dino oil changed at 3,000 mile intervals would provide identical results. Are you trying to say that you don't BELIEVE that my chain went 380,000 miles with no apparent stretch?

Have a great day,