I was going nuts with the Dino oil. I think I would just get bored, and change the oil. Never over 3k, sometimes as early as 500 miles. During break in I changed it at 30 miles, 150 miles, 1000 miles, then on to regular intervals. Now I am running synthetic, and its been over 3k. I was led to believe that was fine with synthetic, but now I am starting to get antsy to change it again. But damn, that will get pricey. Clutch is starting to get noisy as well, been wondering if the clutch is on its way out, or if its the oil.
Needless to say, I'm not sure which im putting back in next time.